2–1
2–1 = 1
4–2
4–2 = 2
6–3
6–3 = 3
8–4
8–4 = 4
10-5
10-5 = 5
12-6
12-6 = 6
14-7
14-7 = 7
16-8
16-8 = 8
18-9
18-9 = 9
Subjects:
9 cards submitted by Tim Bottman on Tuesday, March 11th, 2014.
This set of facts includes all the turn-around facts for the doubles. Students should use their knowledge of addition and fact families to solve these facts. For example, when solving 8 - 4, the student should ask, “What plus 4 equals 8?”.
2–1
2–1 = 1
4–2
4–2 = 2
6–3
6–3 = 3
8–4
8–4 = 4
10-5
10-5 = 5
12-6
12-6 = 6
14-7
14-7 = 7
16-8
16-8 = 8
18-9
18-9 = 9