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1 of 10

Doubles

1 + 1 = 2

2 of 10

Doubles

2 + 2 =

4

3 of 10

Doubles

3 + 3 = 6

4 of 10

Doubles

4 + 4 = 8

5 of 10

Doubles

5 + 5 = 10

6 of 10

Doubles

6 + 6 = 12

7 of 10

Doubles

7 + 7 = 14

8 of 10

Doubles

8 + 8 = 16

9 of 10

Doubles

9 + 9 = 18

10 of 10

Doubles

10 + 10 = 20