In dividing numbers we will learn division by 20, 30, 40, …………………, 90, etc.

**For examples: **

**1. **Divide 80 ÷ 20**Solution: **

80 ÷ 20 = 80 ÷ (2 x 10) = 80 ÷ 2 ÷ 10

We divide 80 by 2 and then the obtained quotient is divided by 10.

*So, final quotient = 4***Thus, the quotient = 4**

**2. **Divide 60 ÷ 30**Solution: **

60 ÷ 30 = 60 ÷ (3 x 10) = 60 ÷ 3 ÷ 10

We divide 60 by 3 and then the obtained quotient is divided by 10.

*So, final quotient = 2***Thus, the quotient = 2**

**3. ** Divide 240 by 40**Solution: **

240 ÷ 40 = 240 ÷ (4 x 10) = 240 ÷ 4 ÷ 10

We divide 240 by 4 and then the obtained quotient is divided by 10.

*So, final quotient = 6, ***Thus, the quotient = 6**

**4. **320 ÷ 80

**Solution: **

320 ÷ (8 x 10)

*So, quotient = 4*

(**Note: **This method is applicable only when dividend is completely divisible by divisor.)

**Related Concept**

● Addition

● Check for Subtraction and Addition

● Word Problems Involving Addition and Subtraction

● Estimating Sums and Differences

● Multiply a Number by a 2-Digit Number

● Multiplication of a Number by a 3-Digit Number

● Word Problems on Multiplication

● Division of Two-Digit by a One-Digit Numbers

● Division of Four-Digit by a One-Digit Numbers

● Division by 10 and 100 and 1000

● Division by Two-Digit Numbers

**4th Grade Math Activities**

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