81 加法 42 等于多少？
81 + 42 = 123
81加法42 等于 123
竖式演算
验算
- 用减法验算：123 − 42 = 81
- 用减法验算：123 − 81 = 42
相关题目
81 + 41 = 122
81 + 43 = 124
81 + 40 = 121
81 + 44 = 125
81 + 39 = 120
81 + 45 = 126
81 + 38 = 119
81 + 46 = 127
80 + 42 = 122
82 + 42 = 124
83 + 42 = 125
79 + 42 = 121
84 + 42 = 126
78 + 42 = 120
85 + 42 = 127
77 + 42 = 119
23 + 100 = 123
24 + 99 = 123
25 + 98 = 123
26 + 97 = 123
27 + 96 = 123
28 + 95 = 123
71 + 43 = 114
68 + 28 = 96
43 + 82 = 125
16 + 15 = 31
50 + 76 = 126
5 + 15 = 20
41 × 3 = 123
3 × 41 = 123