2-2-5-matemaatika

1. Complete tasks.

5 3
15

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2 8
12

15 + 5 + 3 = 23
15 + 5 = ........
15 + 3 = ........
5 + 3 = ........
15 - 5 = ........
15 - 3 = ........
5 - 3 = ........

4 16
3

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2. Write a circle round ´the wrong number.

A
9 6 8
10 4

C
9 11 15
13 12

     B
4   16   8
14    12

D
9 3 12
11 6