Adding Doubles Strategy Worksheet With Answer Key Page 2
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2Adding Doubles Strategy (D) Answers
Use an adding doubles strategy to find each sum
Example: 9 + 10 = 9 + 9 + 1 = 18 + 1 = 19
6 + 6 =
8 + 6 =
8 + 9 =
6 + 6 = 12
8 + 8 - 2 = 14
8 + 8 + 1 = 17
16 - 2 = 14
16 + 1 = 17
11 + 9 =
3 + 1 =
5 + 3 =
11 + 11 - 2 = 20
3 + 3 - 2 = 4
5 + 5 - 2 = 8
22 - 2 = 20
6 - 2 = 4
10 - 2 = 8
6 + 5 =
5 + 6 =
6 + 5 =
6 + 6 - 1 = 11
5 + 5 + 1 = 11
6 + 6 - 1 = 11
12 - 1 = 11
10 + 1 = 11
12 - 1 = 11
2 + 2 =
7 + 9 =
6 + 7 =
2 + 2 = 4
7 + 7 + 2 = 16
6 + 6 + 1 = 13
14 + 2 = 16
12 + 1 = 13
7 + 8 =
10 + 9 =
4 + 4 =
7 + 7 + 1 = 15
10 + 10 - 1 = 19
4 + 4 = 8
14 + 1 = 15
20 - 1 = 19
8 + 10 =
4 + 3 =
2 + 2 =
8 + 8 + 2 = 18
4 + 4 - 1 = 7
2 + 2 = 4
16 + 2 = 18
8 - 1 = 7
4 + 6 =
8 + 8 =
2 + 0 =
4 + 4 + 2 = 10
8 + 8 = 16
2 + 2 - 2 = 2
8 + 2 = 10
4 - 2 = 2
2 + 0 =
0 + 2 =
9 + 7 =
2 + 2 - 2 = 2
0 + 0 + 2 = 2
9 + 9 - 2 = 16
4 - 2 = 2
0 + 2 = 2
18 - 2 = 16
3 + 3 =
2 + 4 =
2 + 1 =
3 + 3 = 6
2 + 2 + 2 = 6
2 + 2 - 1 = 3
4 + 2 = 6
4 - 1 = 3
2 + 1 =
5 + 4 =
9 + 11 =
2 + 2 - 1 = 3
5 + 5 - 1 = 9
9 + 9 + 2 = 20
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