Page 82 - Start Up Mathematics_1

(p) 708 – 435 (q) 321 – 107 (r) 824 – 555

H T O H T O H T O

– – –

Checking Subtraction

To check if you have subtracted two numbers correctly, add their difference to

the smaller number. The sum should give you the bigger number.
Look at the given example.

Checking

T O T O

6 5 bigger number 3 3 difference

– 3 2 smaller number + 3 2 smaller number

3 3 difference 6 5 bigger number

6 Find the difference and check.

(a) 62 – 37 (b) 84 – 6 (c) 83 – 54 (d) 44 – 27
T O T O T O T O

– – – –

Checking Checking Checking Checking
T O T O T O T O

+ + + +

74