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E:\Working\Orange_Education\Math_Genius_1\Open_Files\Chap_7
\ 04-Oct-2025 Bharat arora Proof-9 Reader’s Sign _______________________ Date __________

subtrACting 1-digit numbers subtrACtion in tens
from 2-digit numbers example 1: Subtract 20 from 30.

example: A fruit seller had 38 apples. He sold Solution: When we subtract 2 tens from 3 tens, we are left with 1 ten as shown below.
8 apples. How many apples were left with Tens Ones

him?
Solution: To know the number of apples – = 3 0

left with the fruit seller, we need to subtract – 2 0
8 from 38. 1 0

Step 1. first subtract the ones. Step 2. Then, subtract the tens. 3 tens – 2 tens = 1 ten

Tens Ones Tens Ones Thus, 30 – 20 = 10.

3 8 3 8 example 2: find 40 – 10.
– 8
– 8 Solution: When we take away 1 ten from 4 tens, we are left with 3 tens.

0 3 0 Tens Ones

4 0

– 1 0

3 0

4 tens – 1 ten = 3 tens

Thus, the fruit seller was left with 30 apples. Thus, 40 – 10 = 30.

Practice time 7d Practice time 7e

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

4 8 3 6 6 7 7 9 7 0 5 0 4 0 7 0

– 6 – 1 – 6 – 7 – 6 0 – 3 0 – 2 0 – 4 0

5. Tens Ones 6. Tens Ones 7. Tens Ones 5. Tens Ones 6. Tens Ones 7. Tens Ones 8. Tens Ones

Think Tank
2 8 9 5 8 6 6 0 8 0 4 0 9 0
A shopkeeper had some
– 6 – 3 – 5 apples. After selling 7, he – 5 0 – 1 0 – 3 0 – 7 0
had 33 left. How many did
he start with?

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