31 加法 47 等于多少？
31 + 47 = 78
31加法47 等于 78
竖式演算
验算
- 用减法验算：78 − 47 = 31
- 用减法验算：78 − 31 = 47
相关题目
31 + 46 = 77
31 + 48 = 79
31 + 49 = 80
31 + 45 = 76
31 + 50 = 81
31 + 44 = 75
31 + 51 = 82
31 + 43 = 74
30 + 47 = 77
32 + 47 = 79
29 + 47 = 76
33 + 47 = 80
28 + 47 = 75
34 + 47 = 81
35 + 47 = 82
27 + 47 = 74
1 + 77 = 78
2 + 76 = 78
3 + 75 = 78
4 + 74 = 78
5 + 73 = 78
6 + 72 = 78
54 + 11 = 65
5 + 34 = 39
75 + 10 = 85
11 + 32 = 43
15 + 71 = 86
73 + 10 = 83
94 - 16 = 78
87 - 9 = 78