Number Family

Addition & Subtraction Facts

Material A

5, 6, 11 5, 7, 12 5, 8, 13

5 + 6 = 11, 6 + 5 = 11, 11 − 5 = 6, 11 − 6 = 5 5 + 7 = 12, 7 + 5 = 12, 12 − 5 = 7, 12 − 7 = 5 5 + 8 = 13, 8 + 5 = 13, 13 − 5 = 8, 13 − 8 = 5

Material B

6, 7, 13 6, 8, 14 6, 9, 15

6 + 7 = 13, 7 + 6 = 13, 13 − 6 = 7, 13 − 7 = 6 6 + 8 = 14, 8 + 6 = 14, 14 − 6 = 8, 14 − 8 = 6 6 + 9 = 15, 9 + 6 = 15, 15 − 6 = 9, 15 − 9 = 6