31 加法 40 等于多少？
31 + 40 = 71
31加法40 等于 71
竖式演算
验算
- 用减法验算：71 − 40 = 31
- 用减法验算：71 − 31 = 40
相关题目
31 + 39 = 70
31 + 41 = 72
31 + 38 = 69
31 + 42 = 73
31 + 37 = 68
31 + 43 = 74
31 + 44 = 75
31 + 36 = 67
30 + 40 = 70
32 + 40 = 72
29 + 40 = 69
33 + 40 = 73
28 + 40 = 68
34 + 40 = 74
35 + 40 = 75
27 + 40 = 67
1 + 70 = 71
2 + 69 = 71
3 + 68 = 71
4 + 67 = 71
5 + 66 = 71
6 + 65 = 71
41 + 31 = 72
43 + 34 = 77
61 + 23 = 84
20 + 13 = 33
56 + 31 = 87
4 + 5 = 9
71 × 1 = 71
92 - 21 = 71