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Subtraction strategies: counting up
When the numbers are close neighbours, count up
34 cards·by kassy4
subtractionmath
12-9
3
11-8
3
10-7
3
9-6
3
8-5
3
7-4
3
6-3
3
5-2
3
5-2
3
12-10
2
11-9
2
12-9
3
11-8
3
10-7
3
9-6
3
8-5
3
7-4
3
6-3
3
12-10
2
11-9
2
10-8
2
9-7
2
8-6
2
7-5
2
6-4
2
5-3
2
12-11
1
11-10
1
10-9
1
9-8
1
8-7
1
7-6
1
6-5
1
5-4
1