Page 33 - MTH 1

Addition and Subtraction Facts

There are two subtraction

facts of each addition.

If 7 + 1 = 8 (addition)

then fact I 8 – 1 = 7 (subtraction)

and fact II 8 – 7 = 1 (subtraction)

Similarly; 6 + 3 = 9 (addition)

fact I 9 – 3 = 6 (subtraction)

fact II 9 – 6 = 3 (subtraction)

Now if; 7 – 1 = 6 (subtraction)

then 6 + 1 = 7 (addition fact)

(Note : There are 2 subtraction facts but only 1 addition fact)

Write subtraction facts of.

6 + 1 = 7 4 + 3 = 7 3 + 2 = 5

4 + 2 = 6 5 + 4 = 9 8 + 1 = 9

Write addition fact of.

6 – 1 = 5 4 – 3 = 1 3 – 2 = 1

4 – 2 = 2 5 – 4 = 1 8 – 1 = 7

33
Mathematics In Focus - 1