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