31 加法 39 等于多少？
31 + 39 = 70
31加法39 等于 70
竖式演算
验算
- 用减法验算：70 − 39 = 31
- 用减法验算：70 − 31 = 39
相关题目
31 + 38 = 69
31 + 40 = 71
31 + 37 = 68
31 + 41 = 72
31 + 42 = 73
31 + 36 = 67
31 + 43 = 74
31 + 35 = 66
30 + 39 = 69
32 + 39 = 71
29 + 39 = 68
33 + 39 = 72
28 + 39 = 67
34 + 39 = 73
35 + 39 = 74
27 + 39 = 66
1 + 69 = 70
2 + 68 = 70
3 + 67 = 70
4 + 66 = 70
5 + 65 = 70
6 + 64 = 70
86 + 91 = 177
17 + 9 = 26
87 + 41 = 128
35 + 56 = 91
45 + 45 = 90
75 + 33 = 108
98 - 28 = 70
2 × 35 = 70