W8489PR-Learn from Home Workbook 2

METHODS OF SUBTRACTION
N
Number
1. Use partitioning to solve these subtraction sums.
Example: 39 – 24 = 39 – 20 – 4
19 – 4
15
(a) 48 – 16 = – – (b) 57 – 32 = – –
= – = –
= =
(c) 59 – 24 = – – (d) 64 – 41 = – –
= – = –
= =
2. Use the expanded method to solve these subtraction sums.
Example: 39 – 24
30 + 9
– 20 + 4
10 + 5 = 15
(a) 47 – 12 (b) 56 – 33
+ +
– + – +
+ = + =
(c) 65 – 44 (d) 79 – 52 (e) 88 – 27
+ + +
– + – + – +
+ = + = + =
Viewing sample
CHALLENGE
On the back of the sheet, solve these subtraction sums.
(a) 83 – 21 (b) 96 – 74 (c) 79 – 56
Objective
Solves subtraction sums using partitioning and the expanded method.
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