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SubtrACting A number from itSelf

Alka has 3 apples. She eats all three apples. How many
apples are left?

Clearly, 0.

So, 3 – 3 = 0

Similarly, 8 – 8 = 0, 9 – 9 = 0 and so on.
When we subtract a number from itself, the answer is zero (0).

Exercise 4B

1. Subtract 0.

a. 6 – 0 = b. 9 – 0 = c. 7 – 0 =

d. 8 – 0 = e. 5 – 0 = f. 2 – 0 =

g. 12 – 0 = h. 16 – 0 = i. 19 – 0 =

2. Subtract 1.

a. 9 – 1 = b. 7 – 1 = c. 8 – 1 =

d. 6 – 1 = e. 5 – 1 = f. 3 – 1 =

g. 13 – 1 = h. 15 – 1 = i. 20 – 1 =

3. Subtract the number from itself.

a. 5 – 5 = b. 6 – 6 = c. 8 – 8 =

d. 1 – 1 = e. 9 – 9 = f. 17 – 17 =

g. 14 – 14 = h. 13 – 13 = i. 19 – 19 =

56 Mathematics 1