31 加法 84 等于多少？
31 + 84 = 115
31加法84 等于 115
竖式演算
验算
- 用减法验算：115 − 84 = 31
- 用减法验算：115 − 31 = 84
相关题目
31 + 83 = 114
31 + 85 = 116
31 + 82 = 113
31 + 86 = 117
31 + 87 = 118
31 + 81 = 112
31 + 88 = 119
31 + 80 = 111
30 + 84 = 114
32 + 84 = 116
29 + 84 = 113
33 + 84 = 117
28 + 84 = 112
34 + 84 = 118
35 + 84 = 119
27 + 84 = 111
15 + 100 = 115
16 + 99 = 115
17 + 98 = 115
18 + 97 = 115
19 + 96 = 115
20 + 95 = 115
62 + 85 = 147
27 + 66 = 93
57 + 15 = 72
42 + 82 = 124
37 + 44 = 81
94 + 25 = 119
5 × 23 = 115
23 × 5 = 115