1 加法 18 等于多少？

1 + 17 = 18 1 + 19 = 20 1 + 20 = 21 1 + 16 = 17 1 + 21 = 22 1 + 15 = 16 1 + 22 = 23 1 + 14 = 15 2 + 18 = 20 3 + 18 = 21 4 + 18 = 22 5 + 18 = 23 6 + 18 = 24 7 + 18 = 25 8 + 18 = 26 9 + 18 = 27 2 + 17 = 19 3 + 16 = 19 4 + 15 = 19 5 + 14 = 19 6 + 13 = 19 7 + 12 = 19 61 + 2 = 63 100 + 80 = 180 70 + 29 = 99 17 + 12 = 29 21 + 58 = 79 12 + 30 = 42 62 - 43 = 19 30 - 11 = 19