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Addition strategies: making 10
When one of the numbers is 7,8,9 make ten and add the extras
18 cards·by kassy4
mathaddition
4+7
11
7+4
11
4+8
12
8+4
12
4+9
13
9+4
13
5+7
12
7+5
12
5+8
13
8+5
13
5+9
14
9+5
14
7+6
13
6+7
13
6+8
14
8+6
14
6+9
15
9+6
15