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subtrACtion in tens

Example 1: Subtract 20 from 30.

Solution: When we subtract 2 tens from 3 tens, we are left with 1 ten as shown below.

tens Ones

3 0
– =
– 2 0

1 0

3 tens – 2 tens = 1 ten

Thus, 30 – 20 = 10.

Example 2: Find 40 – 10.

Solution: When we take away 1 ten from 4 tens, we are left with 3 tens.

tens Ones

4 0

– 1 0

3 0

4 tens – 1 ten = 3 tens

Thus, 40 – 10 = 30.

Practice time 7e

Subtract the tens.
1. tens Ones 2. tens Ones 3. tens Ones 4. tens Ones

7 0 5 0 4 0 7 0

– 6 0 – 3 0 – 2 0 – 4 0

5. tens Ones 6. tens Ones 7. tens Ones 8. tens Ones

6 0 8 0 4 0 9 0

– 5 0 – 1 0 – 3 0 – 7 0

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