40 加法 80 等于多少？
40 + 80 = 120
40加法80 等于 120
竖式演算
验算
- 用减法验算：120 − 80 = 40
- 用减法验算：120 − 40 = 80
相关题目
40 + 79 = 119
40 + 81 = 121
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40 + 83 = 123
40 + 77 = 117
40 + 84 = 124
40 + 76 = 116
39 + 80 = 119
41 + 80 = 121
38 + 80 = 118
42 + 80 = 122
37 + 80 = 117
43 + 80 = 123
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20 + 100 = 120
21 + 99 = 120
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25 + 95 = 120
56 + 62 = 118
93 + 60 = 153
13 + 28 = 41
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40 × 3 = 120
15 × 8 = 120