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