Maths

Division

Class 3

🎯 Learning Objectives

📖 What is Division?

Aarav has 12 laddoos. He wants to share them equally among 4 friends. How many laddoos will each friend get? To find out, we divide: 12 ÷ 4 = 3. Each friend gets 3 laddoos.

Division means splitting a number into equal parts. It is the opposite of multiplication. If 4 × 3 = 12, then 12 ÷ 4 = 3.

We can think of division in two ways:

  • Equal Sharing: Distributing items equally among a given number of groups. (How many in each group?)
  • Grouping: Making groups of a given size from a collection. (How many groups can we make?)

Division as Equal Sharing

When we share things equally, we use division.

Example 1: Sharing Laddoos

Priya made 20 laddoos for Diwali. She wants to pack them equally into 5 boxes. How many laddoos in each box?

Solution: 20 ÷ 5 = 4. Each box will have 4 laddoos.

Example 2: Distributing Notebooks

A teacher has 24 notebooks to distribute equally among 6 students. How many notebooks does each student get?

Solution: 24 ÷ 6 = 4. Each student gets 4 notebooks.

Division as Grouping

Sometimes we know the size of each group and want to find how many groups we can make.

Example 3: Making Teams

There are 18 children in a class. The teacher wants to make teams of 3. How many teams can be formed?

Solution: 18 ÷ 3 = 6. The teacher can make 6 teams.

Example 4: Packing Mangoes

A fruit seller has 30 mangoes. He puts 5 mangoes in each bag. How many bags does he need?

Solution: 30 ÷ 5 = 6. He needs 6 bags.

12 laddoos being shared equally into 4 plates showing division as sharing

Division as Repeated Subtraction

Division can also be understood as repeated subtraction. We keep subtracting the divisor from the dividend until we reach 0 (or a number smaller than the divisor). The number of times we subtract is the quotient.

Example: 15 ÷ 3 using Repeated Subtraction

15 − 3 = 12 (subtracted 1 time)

12 − 3 = 9  (subtracted 2 times)

9 − 3 = 6   (subtracted 3 times)

6 − 3 = 3   (subtracted 4 times)

3 − 3 = 0   (subtracted 5 times)

We subtracted 3 a total of 5 times. So, 15 ÷ 3 = 5.

Example: 20 ÷ 4 using Repeated Subtraction

20 − 4 = 16 → 16 − 4 = 12 → 12 − 4 = 8 → 8 − 4 = 4 → 4 − 4 = 0

We subtracted 4 a total of 5 times. So, 20 ÷ 4 = 5.

Division Facts from Multiplication Tables

Every multiplication fact gives us two division facts. If you know your tables, you can divide quickly!

Multiplication FactDivision Fact 1Division Fact 2
3 × 4 = 1212 ÷ 3 = 412 ÷ 4 = 3
5 × 6 = 3030 ÷ 5 = 630 ÷ 6 = 5
7 × 8 = 5656 ÷ 7 = 856 ÷ 8 = 7
9 × 4 = 3636 ÷ 9 = 436 ÷ 4 = 9
6 × 7 = 4242 ÷ 6 = 742 ÷ 7 = 6
8 × 9 = 7272 ÷ 8 = 972 ÷ 9 = 8
Think: If you know that 6 × 9 = 54, you instantly know that 54 ÷ 6 = 9 and 54 ÷ 9 = 6. Multiplication and division are like best friends!

Special Division Rules:

Long Division (2-digit ÷ 1-digit)

For bigger numbers, we use long division. Let us learn the steps: Divide → Multiply → Subtract → Bring Down.

Example 1: 84 ÷ 4
Long Division
   2 1
4 ) 8 4
  −8 ↓
   0 4
   −4
    0

Step 1: Divide the tens digit. 8 ÷ 4 = 2. Write 2 in the quotient (tens place).

Step 2: Multiply. 2 × 4 = 8. Write 8 below 8.

Step 3: Subtract. 8 − 8 = 0.

Step 4: Bring down the ones digit (4). Now divide 4 ÷ 4 = 1. Write 1 in the quotient.

Step 5: Multiply. 1 × 4 = 4. Subtract. 4 − 4 = 0. Remainder = 0.

Answer: 84 ÷ 4 = 21

Long Division: Another Example

Example 2: 96 ÷ 3
Long Division
   3 2
3 ) 9 6
  −9 ↓
   0 6
   −6
    0

Step 1: Divide tens. 9 ÷ 3 = 3. Write 3 in quotient.

Step 2: Multiply. 3 × 3 = 9. Subtract. 9 − 9 = 0.

Step 3: Bring down 6. Divide 6 ÷ 3 = 2. Write 2 in quotient.

Step 4: Multiply. 2 × 3 = 6. Subtract. 6 − 6 = 0. Remainder = 0.

Answer: 96 ÷ 3 = 32

Example 3: 75 ÷ 5

Tens: 7 ÷ 5 = 1 (remainder 2). Multiply: 1 × 5 = 5. Subtract: 7 − 5 = 2. Bring down 5 → 25. Divide: 25 ÷ 5 = 5. Multiply: 5 × 5 = 25. Subtract: 25 − 25 = 0.

Answer: 75 ÷ 5 = 15

20 mangoes grouped into bags of 5 showing division as grouping

Division with Remainder

Sometimes a number does not divide exactly. The amount left over is called the remainder.

Example 1: 17 ÷ 5

How many times does 5 go into 17? → 5 × 3 = 15 (fits). 5 × 4 = 20 (too big!).

So, Quotient = 3. Remainder = 17 − 15 = 2.

Answer: 17 ÷ 5 = 3 remainder 2

We write: 17 = 5 × 3 + 2

Example 2: 23 ÷ 4

4 × 5 = 20 (fits). 4 × 6 = 24 (too big!).

Quotient = 5. Remainder = 23 − 20 = 3.

Answer: 23 ÷ 4 = 5 remainder 3

Example 3: 47 ÷ 6

6 × 7 = 42 (fits). 6 × 8 = 48 (too big!).

Quotient = 7. Remainder = 47 − 42 = 5.

Answer: 47 ÷ 6 = 7 remainder 5

Remember: The remainder is always less than the divisor. If the remainder is equal to or greater than the divisor, you need to divide one more time!

Checking Division

We can always check if our division answer is correct using this formula:

Quotient × Divisor + Remainder = Dividend
Check Example 1: 84 ÷ 4 = 21

Quotient = 21, Divisor = 4, Remainder = 0

Check: 21 × 4 + 0 = 84 ✓ Correct!

Check Example 2: 17 ÷ 5 = 3 remainder 2

Quotient = 3, Divisor = 5, Remainder = 2

Check: 3 × 5 + 2 = 15 + 2 = 17 ✓ Correct!

Check Example 3: 47 ÷ 6 = 7 remainder 5

Quotient = 7, Divisor = 6, Remainder = 5

Check: 7 × 6 + 5 = 42 + 5 = 47 ✓ Correct!

Word Problems (Indian Context)

Problem 1: Sharing Sweets

Meena's mother made 36 gulab jamuns for a party. She wants to serve them equally on 9 plates. How many gulab jamuns on each plate?

Solution: 36 ÷ 9 = 4. Each plate will have 4 gulab jamuns.

Problem 2: Distributing Books

The school library received 72 new books. The librarian wants to place them equally on 8 shelves. How many books on each shelf?

Solution: 72 ÷ 8 = 9. Each shelf will have 9 books.

Problem 3: Sharing Money (₹ Rupees)

Arjun's grandfather gave ₹45 to be shared equally among 5 grandchildren. How much does each grandchild get?

Solution: ₹45 ÷ 5 = ₹9. Each grandchild gets ₹9.

Problem 4: Packing Items

A shopkeeper has 50 pencils. He packs them in bundles of 6. How many full bundles can he make? How many pencils are left over?

Solution: 50 ÷ 6 = 8 remainder 2. He can make 8 full bundles with 2 pencils left over.

Problem 5: Arranging Chairs

For the school assembly, 63 chairs need to be arranged in 7 equal rows. How many chairs in each row?

Solution: 63 ÷ 7 = 9. Each row will have 9 chairs.

20 mangoes grouped into bags of 5 showing division as grouping

📝 Key Words

WordMeaning
DivisionSplitting a number into equal parts or groups
DividendThe number being divided (the total)
DivisorThe number we divide by (number of groups or size of each group)
QuotientThe answer we get after dividing
RemainderThe amount left over when division is not exact
Equal SharingDistributing items equally among groups
GroupingMaking groups of a fixed size from a collection
Repeated SubtractionSubtracting the divisor again and again until we reach 0 or less than the divisor
Long DivisionA step-by-step method to divide larger numbers (Divide → Multiply → Subtract → Bring Down)
Inverse OperationDivision is the inverse (opposite) of multiplication
⭐ Key Points to Remember

Finished learning? Now test what you know!