40 加法 31 等于多少？
40 + 31 = 71
40加法31 等于 71
竖式演算
验算
- 用减法验算：71 − 31 = 40
- 用减法验算：71 − 40 = 31
相关题目
40 + 30 = 70
40 + 32 = 72
40 + 29 = 69
40 + 33 = 73
40 + 28 = 68
40 + 34 = 74
40 + 35 = 75
40 + 27 = 67
39 + 31 = 70
41 + 31 = 72
38 + 31 = 69
42 + 31 = 73
37 + 31 = 68
43 + 31 = 74
44 + 31 = 75
36 + 31 = 67
1 + 70 = 71
2 + 69 = 71
3 + 68 = 71
4 + 67 = 71
5 + 66 = 71
6 + 65 = 71
33 + 65 = 98
100 + 18 = 118
73 + 3 = 76
21 + 71 = 92
50 + 38 = 88
2 + 87 = 89
98 - 27 = 71
97 - 26 = 71