13 加法 7 等于多少？

13 + 6 = 19 13 + 8 = 21 13 + 5 = 18 13 + 9 = 22 13 + 4 = 17 13 + 10 = 23 13 + 11 = 24 13 + 3 = 16 12 + 7 = 19 14 + 7 = 21 11 + 7 = 18 15 + 7 = 22 10 + 7 = 17 16 + 7 = 23 17 + 7 = 24 9 + 7 = 16 1 + 19 = 20 2 + 18 = 20 3 + 17 = 20 4 + 16 = 20 5 + 15 = 20 6 + 14 = 20 56 + 50 = 106 70 + 51 = 121 80 + 76 = 156 47 + 26 = 73 70 + 73 = 143 9 + 85 = 94 75 - 55 = 20 82 - 62 = 20