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subtrACtion of 2-digit numbers

example 1: Ravi bought 54 eggs and found that 23 were rotten.
How many eggs were good?

Solution: To know the number of good eggs, we Tens Ones

need to subtract 23 from 54. 5 4

Step 1. Write the smaller number below the larger – 2 3
number according to the place value of the digits.

Step 2. first subtract the ones.

Tens Ones

5 4

– 2 3
1

Step 3. Subtract the tens next.

Tens Ones

5 4

– 2 3

3 1

Thus, there were 31 good eggs.

example 2: Subtract 43 from 65.
Solution:

Step 1. Subtract the ones first. Step 2. Subtract the tens next.

Tens Ones Tens Ones

6 5 6 5

– 4 3 – 4 3
2 2 2

Thus, 65 – 43 = 22.

110 Mathematics-1