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