Adding Doubles Strategy Worksheets With Answer Keys Page 6
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20Adding Doubles Strategy (C) Answers
Use an adding doubles strategy to find each sum
Example: 7 + 5 = 7 + 7 - 2 = 14 - 2 = 12
7 + 7 =
3 + 3 =
4 + 2 =
7 + 7 = 14
3 + 3 = 6
4 + 4 - 2 = 6
8 - 2 = 6
6 + 4 =
10 + 8 =
6 + 4 =
6 + 6 - 2 = 10
10 + 10 - 2 = 18
6 + 6 - 2 = 10
12 - 2 = 10
20 - 2 = 18
12 - 2 = 10
5 + 6 =
6 + 6 =
5 + 6 =
5 + 5 + 1 = 11
6 + 6 = 12
5 + 5 + 1 = 11
10 + 1 = 11
10 + 1 = 11
10 + 8 =
6 + 5 =
1 + 0 =
10 + 10 - 2 = 18
6 + 6 - 1 = 11
1 + 1 - 1 = 1
20 - 2 = 18
12 - 1 = 11
2 - 1 = 1
9 + 10 =
7 + 9 =
10 + 8 =
9 + 9 + 1 = 19
7 + 7 + 2 = 16
10 + 10 - 2 = 18
18 + 1 = 19
14 + 2 = 16
20 - 2 = 18
2 + 1 =
1 + 2 =
4 + 3 =
2 + 2 - 1 = 3
1 + 1 + 1 = 3
4 + 4 - 1 = 7
4 - 1 = 3
2 + 1 = 3
8 - 1 = 7
6 + 6 =
3 + 2 =
9 + 10 =
6 + 6 = 12
3 + 3 - 1 = 5
9 + 9 + 1 = 19
6 - 1 = 5
18 + 1 = 19
3 + 5 =
9 + 10 =
7 + 6 =
3 + 3 + 2 = 8
9 + 9 + 1 = 19
7 + 7 - 1 = 13
6 + 2 = 8
18 + 1 = 19
14 - 1 = 13
1 + 0 =
4 + 4 =
1 + 3 =
1 + 1 - 1 = 1
4 + 4 = 8
1 + 1 + 2 = 4
2 - 1 = 1
2 + 2 = 4
2 + 3 =
2 + 0 =
7 + 9 =
2 + 2 + 1 = 5
2 + 2 - 2 = 2
7 + 7 + 2 = 16
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