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Almost Doubles Addition with Subtraction Opposites
One offs for the addition, but the answer is the total from the addition subtracting the numbers used for addition.
12
Mathematics
2nd Grade
12/07/2011
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Cards

Term
1 + 2
 Definition
3 - 2 = 1
Term
2 + 3
 Definition
5 - 3 = 2
Term
3 + 4
 Definition
7 - 4 = 3
Term
4 + 5
 Definition
9 - 5 = 4
Term
5 + 6
 Definition
11 - 6 = 5
Term
6 + 7
 Definition
13 - 7 = 6
Term
7 + 8
 Definition
15 - 8 = 7
Term
8 + 9
 Definition
17 - 9 = 8
Term
9 + 10
 Definition
19 - 10 = 9
Term
10 + 11
 Definition
21 - 11 = 10
Term
11 + 12
 Definition
23 - 12 = 11
Term
12 + 13
 Definition
25 - 13 = 12
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