31 加法 50 等于多少？
31 + 50 = 81
31加法50 等于 81
竖式演算
验算
- 用减法验算：81 − 50 = 31
- 用减法验算：81 − 31 = 50
相关题目
31 + 49 = 80
31 + 51 = 82
31 + 48 = 79
31 + 52 = 83
31 + 47 = 78
31 + 53 = 84
31 + 46 = 77
31 + 54 = 85
30 + 50 = 80
32 + 50 = 82
29 + 50 = 79
33 + 50 = 83
28 + 50 = 78
34 + 50 = 84
35 + 50 = 85
27 + 50 = 77
1 + 80 = 81
2 + 79 = 81
3 + 78 = 81
4 + 77 = 81
5 + 76 = 81
6 + 75 = 81
60 + 26 = 86
20 + 46 = 66
30 + 19 = 49
60 + 11 = 71
60 + 15 = 75
2 + 81 = 83
96 - 15 = 81
27 × 3 = 81