78 加法 42 等于多少？
78 + 42 = 120
78加法42 等于 120
竖式演算
验算
- 用减法验算：120 − 42 = 78
- 用减法验算：120 − 78 = 42
相关题目
78 + 41 = 119
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78 + 45 = 123
78 + 38 = 116
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77 + 42 = 119
79 + 42 = 121
76 + 42 = 118
80 + 42 = 122
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21 + 99 = 120
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96 + 28 = 124
86 + 15 = 101
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