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