Page 44 - Touchpad Mathematics V1.0 C1

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Combinations of 8 Combinations of 9

8 + = 8 9 + = 9

+ 1 = 8 + 1 = 9

+ = 8 + = 9

5 + 3 = 6 + 3 =

4 + = 8 5 + = 9

3 + 5 = 4 + 5 =
+ 6 = 8 + 6 = 9

1 + 7 = 2 + 7 =

+ = 8 1 + = 9

Number of combinations = 9 + = 9
Number of combinations = 10

Here the combinations are made using only two coloured
apples — red and green. There is one more combination Tips

than the number itself.
We can make many combinations using more than two
coloured objects.

Exercise 3E

1. Use two different colours to show the combinations of 10 by colouring boxes.

10 + 0 = 10

9 + 1 = 10
+ =

+ =

+ =

+ =

+ =
+ =

+ =

+ =

+ =

42 Mathematics 1