(Add/Sub) Matching "Fact Families"
| __ | 1. | 12 + _= 24 | | A. | 24 - 12 = _ | | __ | 2. | 15 + 5 = | | B. | 38 + 4 = _ | | __ | 3. | 20 - _ = 13 | | C. | 21 + 15 = _ | | __ | 4. | 31 + 9 = _ | | D. | 22 - 10 = _ | | __ | 5. | 36 - _ = 21 | | E. | 65 + _ = 75 | | __ | 6. | 42 - _= 38 | | F. | 18 - 14 = _ | | __ | 7. | 54- 7= _ | | G. | 20 - _ = 15 | | __ | 8. | 75 - 10 = _ | | H. | 47 + 7 = _ | | __ | 9. | _ + 4 = 18 | | I. | 7 + _ =20 | | __ | 10. | _ + 12 =22 | | J. | 40 - 31 =_ |
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