28 加法 42 等于多少?
28 + 42 = 70
28加法42 等于 70
竖式演算
验算
- 用减法验算:70 − 42 = 28
- 用减法验算:70 − 28 = 42
相关题目
28 + 41 = 69
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28 + 45 = 73
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29 + 42 = 71
27 + 42 = 69
30 + 42 = 72
26 + 42 = 68
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2 + 68 = 70
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