Page 58 - Maths Class 03

Th H T O

9+1 10
1000 1000
1 0 0 0 1 Th is 10 H
– 10 = – 10
– 1 0 10 H is 9 H + 1 H
990
9 9 0 1 H is 10 T

1 Th is 10 H
Th H T O

9+1 9+1 10 10 H is 9 H + 1 H
1000 1000
1 0 0 0 1 H is 10 T
– 1 = – 1
– 1 10 T is 9 T + 1 T
999
9 9 9 1 T is 10 ones

Example : Subtract 178 from 500. Example : Subtract 978 from 3001.

Solution : Solution :

H T O Th H T O
500 3001
4 9 10 2 9 9 11
5 0 0 – 178 3 0 0 1 – 978

– 1 7 8 322 – 9 7 8 2023

3 2 2 2 0 2 3

Checking Subtraction by Addition

Addition is used for checking subtraction errors by adding

the answer we find to the bottom number in the problem.

Let’s subtract 421 from 632.

H T O

6 3 2

– 4 2 1

2 1 1

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