87 加法 42 等于多少？
87 + 42 = 129
87加法42 等于 129
竖式演算
验算
- 用减法验算：129 − 42 = 87
- 用减法验算：129 − 87 = 42
相关题目
87 + 41 = 128
87 + 43 = 130
87 + 40 = 127
87 + 44 = 131
87 + 39 = 126
87 + 45 = 132
87 + 38 = 125
87 + 46 = 133
86 + 42 = 128
88 + 42 = 130
85 + 42 = 127
89 + 42 = 131
84 + 42 = 126
90 + 42 = 132
83 + 42 = 125
91 + 42 = 133
29 + 100 = 129
30 + 99 = 129
31 + 98 = 129
32 + 97 = 129
33 + 96 = 129
34 + 95 = 129
33 + 72 = 105
91 + 84 = 175
1 + 19 = 20
67 + 71 = 138
6 + 6 = 12
40 + 77 = 117
43 × 3 = 129
3 × 43 = 129