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breaking both the numbers

There are 95 seats in a hall. 72 seats have already 95 72
been occupied. How many seats are still vacant?

Subtracting tens: 90 – 70 = 20 90 + 5 70 + 2
Subtracting ones: 5 – 2 = 3

Combining the differences, we get 20 + 3 = 23. Terms in a Subtraction Fact
95 – 72 = 23
So, 95 – 72 = 23.
Thus, 23 seats are still vacant in the hall. Minuend Difference
Subtrahend

Exercise 3A

1. Subtract by counting forward.

a. 75 – 48 = ______ b. 95 – 33 = ______ c. 57 – 25 = ______
d. 45 – 27 = ______ e. 37 – 11 = ______ f. 81 – 59 = ______

2. Solve the following by breaking the smaller number.
a. 70 – 49 = ______ b. 63 – 28 = ______ c. 85 – 34 = ______

d. 76 – 37 = ______ e. 69 – 31 = ______ f. 66 – 34 = ______
3. Subtract the following by breaking both the numbers.

a. 95 – 82 = ______ b. 99 – 26 = ______ c. 56 – 14 = ______
d. 87 – 15 = ______ e. 57 – 23 = ______ f. 49 – 18 = ______

4. Can you think of two numbers whose difference is 42?

SubtrACtIon oF 3-dIgIt nuMbErS

Subtraction without regrouping

Example 1. Subtract 126 from 578.

Solution. Write the smaller number below the bigger number and find the difference.

Step 1. Subtract the ones. H T O

5 7 8

– 1 2 6

2

8 – 6 = 2 ones

56 Mathematics 3