# Phép chia hai chữ số lớp 4: Bài tập và bí quyết học hay chính xác

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4th grade two-digit division is the foundation of what you will learn in this grade math curriculum. But in fact, many children still miscalculate this type of exercise, so the following article Trường THPT Trần Hưng Đạo will reveal the secrets to learning more accurate 2-digit division knowledge that children can refer to and apply.

## The knowledge to prepare when learning the division of two digits in grade 4

Before starting to study 4th grade math, division by two-digit numbers, students need to understand the following knowledge:

### Reviewing the division multiplication table

The multiplication table is the most basic and important foundation when you learn multiplication or division that you will learn from the 2nd grade math curriculum. So, to solve the two-digit division problem, it is necessary to solve the multiplication problem. Master the multiplication table from 1 to 10.

### Mastering the knowledge of 1-digit division

Before you learn about two-digit division, you need to understand how to do 1-digit division.

We will take the following example to better understand the calculation of division by 1 digit.

For example: 21024 : 2 = ? We perform the division in order from left to right. Simultaneously apply 3 steps: division – multiplication – subtraction.

– 2 divided by 2 equals 1, write 1

1 times 2 equals 2, 2 minus 2 equals 0

– Lower 1, 1 cannot be divided by 2, write 0

0 times 2 equals 0, 1 minus 0 equals 1

– Lower 0 get 10, 10 divide 2 get 5, write 5

5 times 2 equals 10, 10 minus 10 equals 0

– Lower 2, 2 divide 2 get 1, write 1

1 times 2 gets 2, 2 minus 2 equals 0

– Lower 4, 4 divided by 2 get 2, write 2

2 times 2 equals 4, 4 minus 4 equals 0

So 21024 : 2 = 10512

### Distinguish division without remainder and with remainder

In addition, in the division calculation, it is also divided into division with remainder and without remainder, so you also need to understand this feature to perform the calculation more accurately. Here’s how to differentiate division with remainder and without remainder in detail:

• No remainder division: This is a division with a remainder of 0

For example: Mom has 10 oranges to divide into 2 baskets, each basket has 5 apples.

We have division: 10:2

We say: 10:2 is divisibility with quotient of 5

• Division with remainder: This is a division with remainder 0 < remainder < divisor

For example: Mother has 7 apples divided equally into 2 baskets, each basket has 3 apples, she has 1 left over.

We have division: 7:2

We say: 7:2 is division with remainder, quotient is 3, remainder 1

### Review rows and classes of natural numbers

In division, students are required to place the equivalent numbers in rows and classes together. Therefore, children need to understand the row and class knowledge of natural numbers, including:

• Hundreds, tens, and units form the unit class

• Hundreds of thousands, tens of thousands, thousands make up the class of thousands ## Instructions for performing 4th grade math division by two digit numbers

After fully equipped with knowledge to help children understand basic division with one digit, here are the steps to perform two-digit division in grade 4 for them to learn:

• Step 1: Put the calculation in the vertical column like a normal 1-digit division calculation

• Step 2: Take the first 2 digits of the divisor and divide by the divisor. At this time, how much quotient you get, multiply by the opposite of the divisor. Then subtract the product from the first 2 digits. Note: If the first 2 digits of the divisor are smaller than the divisor, the first 3 digits of the divisor must be taken and divided by the divisor, and then also multiplied and subtracted in the same way as above.

• Step 3: Keep the number you just received, and then lower the next number of the divided number down to units to get a new number. Continue dividing that number by the divisor to get the next quotient, then multiply the quotient received by the divisor, continue to subtract the original new number for the product received.

• Step 4: Continue to lower the numbers of the divided number in order from left to right, and perform the same calculation steps as step 3 until the number of units is exhausted.

At this point, the quotient sequence received is the result of the 2-digit division calculation that you need to find. The end result can be divisibility or division with remainder.

Note:

• When performing a division calculation, the digits of the number are divided from left to right.
• The final remainder is always less than the divisor
• Divisibility if remainder is 0

For example: 428 : 24 = ?

Step 1: Divide 42 by 24 to get 1

Multiply 1 by 24 to get 24; 42 minus 24 gets 18

Step 2: Keeping 18, lower the next digit to the right of the divisor, the number 8. I got the new number 188

Divide 188 by 24 to get 8

Multiply 8 by 24 to get 184; 188 minus 184 is 4

So: 428 : 24 = 18 and the remainder is 4

## A type of exercise from basic to advanced on division by 2 digit numbers

In the 4th grade math program, with the division of two digits, you will often encounter the following basic types of exercises:

### Form 1: Exercises to calculate and then calculate

Solution method: Students will put the calculation in the vertical column, perform the calculation from left to right and apply the steps to solve the division calculation as analyzed above.

Example 1: 840 : 35 Solution guide:

Step 1: Divide 84 by 35 to get 2

Multiply 2 by 35 to get 70; 84 minus 70 gets 14

Step 2: Keeping 14, lower the next digit to the right of the divisor, which is zero. I got the new number 140

Divide 140 by 35 to get 4

Multiply 4 by 35 to get 140

So: 840 : 35 = 24

Example 2: 352 : 27 = ? Step 1: Divide 35 by 27 to get 1

Multiply 1 by 27 to get 27; 35 minus 27 gets 8

Step 2: Keeping 8, lower the next digit to the right of the divisor is 2. I got the new number 82

Divide 82 by 27 to get 3

Multiply 3 by 27 to get 81 remainder 1

So: 352 : 27 = 13 remainder 1

### Form 2: Applied problems

Solution method: Depending on each problem, students must read the problem carefully to be able to perform the calculation and come up with the correct solution.

Example: A flock of ducks a day produces 780 eggs. The farmer harvests eggs every day and divides them into dozens of different eggs. Each dozen eggs are sold for 24,000 VND. So how much money does the farmer earn from eggs a day? Know that each dozen has 12 fruits.

The number of dozen eggs that the farmer can harvest each day is:

780 : 12 = 65 (dozen eggs)

The amount of eggs that the farmer collects each day is:

65 x 24,000 = 1,560,000 VND

Answer: So every day the farmer earns 1,560,000 VND from harvesting duck eggs.

## The secret to learning knowledge of division of two digits in grade 4

To help children learn 4th grade math, divide by two-digit numbers effectively, parents can immediately apply the following learning tips:

### Build a foundation and love of math with Trường THPT Trần Hưng Đạo Math

Division is a basic operation in elementary school math curriculum. But it is also a difficult knowledge, so many children when learning will find it difficult, even though they understand the nature of the calculation, they still calculate it wrong. Therefore, it is required that parents have appropriate teaching methods to create interest and love for mathematics, so that children can learn this subject effectively. In case parents do not have much time to support their children’s learning, or lack experience in teaching, they can immediately refer to the Trường THPT Trần Hưng Đạo Math application. This is one of the leading English thinking math teaching apps in Vietnam, being trusted by millions of parents. With the content compiled closely following the latest educational program of the Ministry of Education and Training, specifically for preschool and primary school children.

A special feature when children learn math with Trường THPT Trần Hưng Đạo Math is the multi-methods of teaching them math. Include:

• Applying active teaching methods: Stimulating creativity, children actively ask questions to understand the root of the problem given in Mathematics.

• Learning through games: Play while learning with outstanding efficiency. Children are interested, self-directed learning without parents reminding.

• Learning with supplementary workbooks: Help your child develop fine and gross motor skills through solving real-world problems.

Not to mention, all lessons are compiled in the form of videos, funny cartoon images to help children have more interest, instead of just learning from books. At the same time, it helps stimulate children’s memory when learning math much better.

In addition, Trường THPT Trần Hưng Đạo Math also teaches through the English language, so when learning, children will also easily approach foreign languages ​​naturally. Less than 2K/day has been able to help children both improve their ability to learn math and learn English effectively and extremely economically. ### Master the basics of division

To be able to learn and solve grade 4 two-digit division math, parents need to guide and check if their children have mastered the basics of division from multiplication table, how to do 1-digit division, understand division with remainder and divisibility, etc.Only when mastering these knowledge, it is no longer a problem when solving math problems to divide with children.

### Practice with your child to learn 4th grade math divided by two digit numbers regularly

After mastering the theory, parents should practice regularly with their children through do exercises in textbooks, exercise books, discover new knowledge on the internet, participate in competitions, organize games with children… It is regular practice that will help improve children’s memory, thinking and efficiency when learning math in a superior way. ## Exercises to divide two numbers in grade 4 for children to practice on their own

After knowing the secrets of conquering 4th grade math divided by two-digit numbers, here are some exercises for your child to practice on their own:

Lesson 1: Set and calculate:

a. 1296 : 24

b. 180 : 36

3. 37584 : 58

c. 85491 : 63

d. 4992065 : 85

e. 2578 : 32

f. 50167 : 43

Lesson 2: Find x,y know:

a. 73 xy = 3285

b. 10086 : x = 82

Lesson 3: Find the value of the expression:

a. 76345 – 47226 : 34

b. 56308 : 28 + 11

c. 64 + 46434 : 71

Lesson 4: A sewing factory can produce 4,200 sets of clothes per day, divided into dozens, 12 sets each. How many dozen can the factory produce per day?

Lesson 5: Uncle Lan’s orchard has 3,640 fruit trees planted in 14 rows. How many fruit trees are there in each row?

Lesson 6: People arranged 240 sets of tables and chairs in 15 classrooms. How many tables and chairs can be arranged in each room?

Lesson 7: Set and then calculate:

a) 288 : 24

b) 469 : 67

c) 740 : 45

d) 397 : 56

Lesson 8: Find x know:

a. xx 34 = 714

b. 846 : x = 18

Lesson 9: Calculate by the most convenient way:

a) (360 × 25 × 12) : 24 c) (450 × 480 × 44) : ( 15 × 12 ×11)

b) (150 × 35 × 10) : 25 d) (750 × 360 × 56) : (25 × 12 × 7)

Lesson 10: Given a divisibility, where the divisor is a round number. Ask if you remove the last digit of 0 from the divisor, the new quotient is equal to a fraction of the old quotient?

Lesson 11. In the division of 2484 by a natural number, the largest remainder is 34. Find the quotient of that division.

Lesson 12. When multiplying a number by 46, a friend misspelled 46 as 64, so the product to find has increased by 2214 units. Find the correct product of two given numbers.

Lesson 13. When multiplying a number by 79, a friend has put the eigenproducts in the same column as in addition, so the result is 2160. Find the correct product of the two given numbers.

Lesson 14. A person rides a bicycle in 1 hour 12 minutes and gets 23km 400m. How many meters did he walk in 48 minutes?

Lesson 15. Uncle Vinh bought 1425 cement bricks for the floor. Uncle plans to spare 125 tablets, enough to pave 5m2 of toilets. How many square meters is the floor area of ​​Uncle Vinh’s house that needs to be tiled?

Lesson 16: Set and then calculate:

a) 9468 : 18 b) 13275 : 25

c) 18408 : 48 d) 38880 : 15

## Conclude

Above are shared knowledge about division of two digits in grade 4 for your reference. This is an important foundation when learning math for children, not only applied in learning but also in practice. Therefore, parents should cultivate with their children regularly to better support their children’s learning.

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``` 4th grade two-digit division is the foundation of what you will learn in this grade math curriculum. But in fact, many children still miscalculate this type of exercise, so the following article Trường THPT Trần Hưng Đạo will reveal the secrets to learning more accurate 2-digit division knowledge that children can refer to and apply. The knowledge to prepare when learning the division of two digits in grade 4 Before starting to study 4th grade math, division by two-digit numbers, students need to understand the following knowledge: Reviewing the division multiplication table The multiplication table is the most basic and important foundation when you learn multiplication or division that you will learn from the 2nd grade math curriculum. So, to solve the two-digit division problem, it is necessary to solve the multiplication problem. Master the multiplication table from 1 to 10. Mastering the knowledge of 1-digit division Before you learn about two-digit division, you need to understand how to do 1-digit division. We will take the following example to better understand the calculation of division by 1 digit. For example: 21024 : 2 = ? We perform the division in order from left to right. Simultaneously apply 3 steps: division - multiplication - subtraction. - 2 divided by 2 equals 1, write 1 1 times 2 equals 2, 2 minus 2 equals 0 - Lower 1, 1 cannot be divided by 2, write 0 0 times 2 equals 0, 1 minus 0 equals 1 - Lower 0 get 10, 10 divide 2 get 5, write 5 5 times 2 equals 10, 10 minus 10 equals 0 - Lower 2, 2 divide 2 get 1, write 1 1 times 2 gets 2, 2 minus 2 equals 0 - Lower 4, 4 divided by 2 get 2, write 2 2 times 2 equals 4, 4 minus 4 equals 0 So 21024 : 2 = 10512 Distinguish division without remainder and with remainder In addition, in the division calculation, it is also divided into division with remainder and without remainder, so you also need to understand this feature to perform the calculation more accurately. Here's how to differentiate division with remainder and without remainder in detail: No remainder division: This is a division with a remainder of 0 For example: Mom has 10 oranges to divide into 2 baskets, each basket has 5 apples. We have division: 10:2 We say: 10:2 is divisibility with quotient of 5 Division with remainder: This is a division with remainder 0 < remainder < divisor For example: Mother has 7 apples divided equally into 2 baskets, each basket has 3 apples, she has 1 left over. We have division: 7:2 We say: 7:2 is division with remainder, quotient is 3, remainder 1 Review rows and classes of natural numbers In division, students are required to place the equivalent numbers in rows and classes together. Therefore, children need to understand the row and class knowledge of natural numbers, including: Hundreds, tens, and units form the unit class Hundreds of thousands, tens of thousands, thousands make up the class of thousands Instructions for performing 4th grade math division by two digit numbers After fully equipped with knowledge to help children understand basic division with one digit, here are the steps to perform two-digit division in grade 4 for them to learn: Step 1: Put the calculation in the vertical column like a normal 1-digit division calculation Step 2: Take the first 2 digits of the divisor and divide by the divisor. At this time, how much quotient you get, multiply by the opposite of the divisor. Then subtract the product from the first 2 digits. Note: If the first 2 digits of the divisor are smaller than the divisor, the first 3 digits of the divisor must be taken and divided by the divisor, and then also multiplied and subtracted in the same way as above. Step 3: Keep the number you just received, and then lower the next number of the divided number down to units to get a new number. Continue dividing that number by the divisor to get the next quotient, then multiply the quotient received by the divisor, continue to subtract the original new number for the product received. Step 4: Continue to lower the numbers of the divided number in order from left to right, and perform the same calculation steps as step 3 until the number of units is exhausted. At this point, the quotient sequence received is the result of the 2-digit division calculation that you need to find. The end result can be divisibility or division with remainder. Note: When performing a division calculation, the digits of the number are divided from left to right. The final remainder is always less than the divisor Divisibility if remainder is 0 For example: 428 : 24 = ? Step 1: Divide 42 by 24 to get 1 Multiply 1 by 24 to get 24; 42 minus 24 gets 18 Step 2: Keeping 18, lower the next digit to the right of the divisor, the number 8. I got the new number 188 Divide 188 by 24 to get 8 Multiply 8 by 24 to get 184; 188 minus 184 is 4 So: 428 : 24 = 18 and the remainder is 4 A type of exercise from basic to advanced on division by 2 digit numbers In the 4th grade math program, with the division of two digits, you will often encounter the following basic types of exercises: Form 1: Exercises to calculate and then calculate Solution method: Students will put the calculation in the vertical column, perform the calculation from left to right and apply the steps to solve the division calculation as analyzed above. Example 1: 840 : 35 Solution guide: Step 1: Divide 84 by 35 to get 2 Multiply 2 by 35 to get 70; 84 minus 70 gets 14 Step 2: Keeping 14, lower the next digit to the right of the divisor, which is zero. I got the new number 140 Divide 140 by 35 to get 4 Multiply 4 by 35 to get 140 So: 840 : 35 = 24 Example 2: 352 : 27 = ? Step 1: Divide 35 by 27 to get 1 Multiply 1 by 27 to get 27; 35 minus 27 gets 8 Step 2: Keeping 8, lower the next digit to the right of the divisor is 2. I got the new number 82 Divide 82 by 27 to get 3 Multiply 3 by 27 to get 81 remainder 1 So: 352 : 27 = 13 remainder 1 Form 2: Applied problems Solution method: Depending on each problem, students must read the problem carefully to be able to perform the calculation and come up with the correct solution. Example: A flock of ducks a day produces 780 eggs. The farmer harvests eggs every day and divides them into dozens of different eggs. Each dozen eggs are sold for 24,000 VND. So how much money does the farmer earn from eggs a day? Know that each dozen has 12 fruits. The answer: The number of dozen eggs that the farmer can harvest each day is: 780 : 12 = 65 (dozen eggs) The amount of eggs that the farmer collects each day is: 65 x 24,000 = 1,560,000 VND Answer: So every day the farmer earns 1,560,000 VND from harvesting duck eggs. The secret to learning knowledge of division of two digits in grade 4 To help children learn 4th grade math, divide by two-digit numbers effectively, parents can immediately apply the following learning tips: Build a foundation and love of math with Trường THPT Trần Hưng Đạo Math Division is a basic operation in elementary school math curriculum. But it is also a difficult knowledge, so many children when learning will find it difficult, even though they understand the nature of the calculation, they still calculate it wrong. Therefore, it is required that parents have appropriate teaching methods to create interest and love for mathematics, so that children can learn this subject effectively. In case parents do not have much time to support their children's learning, or lack experience in teaching, they can immediately refer to the Trường THPT Trần Hưng Đạo Math application. This is one of the leading English thinking math teaching apps in Vietnam, being trusted by millions of parents. With the content compiled closely following the latest educational program of the Ministry of Education and Training, specifically for preschool and primary school children. A special feature when children learn math with Trường THPT Trần Hưng Đạo Math is the multi-methods of teaching them math. Include: Applying active teaching methods: Stimulating creativity, children actively ask questions to understand the root of the problem given in Mathematics. Learning through games: Play while learning with outstanding efficiency. Children are interested, self-directed learning without parents reminding. Learning with supplementary workbooks: Help your child develop fine and gross motor skills through solving real-world problems. Not to mention, all lessons are compiled in the form of videos, funny cartoon images to help children have more interest, instead of just learning from books. At the same time, it helps stimulate children's memory when learning math much better. In addition, Trường THPT Trần Hưng Đạo Math also teaches through the English language, so when learning, children will also easily approach foreign languages ​​naturally. Less than 2K/day has been able to help children both improve their ability to learn math and learn English effectively and extremely economically. Master the basics of division To be able to learn and solve grade 4 two-digit division math, parents need to guide and check if their children have mastered the basics of division from multiplication table, how to do 1-digit division, understand division with remainder and divisibility, etc.Only when mastering these knowledge, it is no longer a problem when solving math problems to divide with children. Practice with your child to learn 4th grade math divided by two digit numbers regularly After mastering the theory, parents should practice regularly with their children through do exercises in textbooks, exercise books, discover new knowledge on the internet, participate in competitions, organize games with children... It is regular practice that will help improve children's memory, thinking and efficiency when learning math in a superior way. Exercises to divide two numbers in grade 4 for children to practice on their own After knowing the secrets of conquering 4th grade math divided by two-digit numbers, here are some exercises for your child to practice on their own: Lesson 1: Set and calculate: a. 1296 : 24 b. 180 : 36 3. 37584 : 58 c. 85491 : 63 d. 4992065 : 85 e. 2578 : 32 f. 50167 : 43 Lesson 2: Find x,y know: a. 73 xy = 3285 b. 10086 : x = 82 Lesson 3: Find the value of the expression: a. 76345 - 47226 : 34 b. 56308 : 28 + 11 c. 64 + 46434 : 71 Lesson 4: A sewing factory can produce 4,200 sets of clothes per day, divided into dozens, 12 sets each. How many dozen can the factory produce per day? Lesson 5: Uncle Lan's orchard has 3,640 fruit trees planted in 14 rows. How many fruit trees are there in each row? Lesson 6: People arranged 240 sets of tables and chairs in 15 classrooms. How many tables and chairs can be arranged in each room? Lesson 7: Set and then calculate: a) 288 : 24 b) 469 : 67 c) 740 : 45 d) 397 : 56 Lesson 8: Find x know: a. xx 34 = 714 b. 846 : x = 18 Lesson 9: Calculate by the most convenient way: a) (360 × 25 × 12) : 24 c) (450 × 480 × 44) : ( 15 × 12 ×11) b) (150 × 35 × 10) : 25 d) (750 × 360 × 56) : (25 × 12 × 7) Lesson 10: Given a divisibility, where the divisor is a round number. Ask if you remove the last digit of 0 from the divisor, the new quotient is equal to a fraction of the old quotient? Lesson 11. In the division of 2484 by a natural number, the largest remainder is 34. Find the quotient of that division. Lesson 12. When multiplying a number by 46, a friend misspelled 46 as 64, so the product to find has increased by 2214 units. Find the correct product of two given numbers. Lesson 13. When multiplying a number by 79, a friend has put the eigenproducts in the same column as in addition, so the result is 2160. Find the correct product of the two given numbers. Lesson 14. A person rides a bicycle in 1 hour 12 minutes and gets 23km 400m. How many meters did he walk in 48 minutes? Lesson 15. Uncle Vinh bought 1425 cement bricks for the floor. Uncle plans to spare 125 tablets, enough to pave 5m2 of toilets. How many square meters is the floor area of ​​Uncle Vinh's house that needs to be tiled? Lesson 16: Set and then calculate: a) 9468 : 18 b) 13275 : 25 c) 18408 : 48 d) 38880 : 15 Conclude Above are shared knowledge about division of two digits in grade 4 for your reference. This is an important foundation when learning math for children, not only applied in learning but also in practice. Therefore, parents should cultivate with their children regularly to better support their children's learning. ```

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