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Mental Math Strategy: 
Subtraction- 
Bridge 10 -8 
Gr. 3
12 - 8 =
18 - 8 =
10 - 8 =
17 - 8 =
9 - 8 =
13 - 8 =
17 - 8 =
11 - 8 =
14 - 8 =
16 - 8 =
8 - 8 =
11 - 8 =
15 - 8 =
12 - 8 =
18 - 8 =
13 - 8 =
14 - 8 =
10 - 8 =
15 - 8 =
16 - 8 =
9 - 8 =
8 - 8 =
Subtract bridge 10 8 thurs.-gr.3

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Subtract bridge 10 8 thurs.-gr.3