42 加法 81 等于多少？
42 + 81 = 123
42加法81 等于 123
竖式演算
验算
- 用减法验算：123 − 81 = 42
- 用减法验算：123 − 42 = 81
相关题目
42 + 80 = 122
42 + 82 = 124
42 + 83 = 125
42 + 79 = 121
42 + 84 = 126
42 + 78 = 120
42 + 85 = 127
42 + 77 = 119
41 + 81 = 122
43 + 81 = 124
40 + 81 = 121
44 + 81 = 125
39 + 81 = 120
45 + 81 = 126
38 + 81 = 119
46 + 81 = 127
23 + 100 = 123
24 + 99 = 123
25 + 98 = 123
26 + 97 = 123
27 + 96 = 123
28 + 95 = 123
9 + 59 = 68
98 + 40 = 138
80 + 49 = 129
83 + 56 = 139
27 + 15 = 42
81 + 86 = 167
3 × 41 = 123
41 × 3 = 123