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Addition strategies: 11+.., 12+..., etc.
From 11 to 14
20 cards·by kassy4
mathaddition
11+6
17
11+7
18
11+8
19
11+9
20
12+5
17
11+5
16
12+6
18
12+7
19
12+8
20
12+9
21
13+5
18
13+6
19
13+7
20
13+8
21
13+9
22
14+5
19
14+6
20
14+7
21
14+8
22
14+9
23