Page 68 - ICSE Math 2
P. 68
Subtraction Facts
1. In subtraction, the order of numbers is very important. A bigger number
cannot be subtracted from a smaller number.
4 – 3 = 1 3 – 4 ≠ 1
Not
– = – = possible
2. Subtraction of zero from a number: On subtracting zero from a number,
the number remains unchanged.
3 – 0 = 3
– =
3. Subtracting any number from itself results in zero.
3 – 3 = 0
– =
Top Tip
• Every addition has two subtraction facts.
2 + 5 = 7 means 7 – 2 = 5 and 7 – 5 = 2.
• Every subtraction has two addition facts.
7 – 5 = 2 means 2 + 5 = 7 and 5 + 2 = 7.
2. Write the subtrac on facts for the following. One has been done for
you.
(a) 2 + 6 = 8 8 – 6 = 2 8 – 2 = 6
(b) 4 + 1 = 5
(c) 2 + 1 = 3
(d) 3 + 6 = 9
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