84 加法 31 等于多少？
84 + 31 = 115
84加法31 等于 115
竖式演算
验算
- 用减法验算：115 − 31 = 84
- 用减法验算：115 − 84 = 31
相关题目
84 + 30 = 114
84 + 32 = 116
84 + 29 = 113
84 + 33 = 117
84 + 28 = 112
84 + 34 = 118
84 + 35 = 119
84 + 27 = 111
83 + 31 = 114
85 + 31 = 116
82 + 31 = 113
86 + 31 = 117
87 + 31 = 118
81 + 31 = 112
88 + 31 = 119
80 + 31 = 111
15 + 100 = 115
16 + 99 = 115
17 + 98 = 115
18 + 97 = 115
19 + 96 = 115
20 + 95 = 115
44 + 81 = 125
72 + 56 = 128
95 + 21 = 116
51 + 54 = 105
7 + 78 = 85
85 + 44 = 129
23 × 5 = 115
5 × 23 = 115