80 加法 49 等于多少？
80 + 49 = 129
80加法49 等于 129
竖式演算
验算
- 用减法验算：129 − 49 = 80
- 用减法验算：129 − 80 = 49
相关题目
80 + 48 = 128
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80 + 52 = 132
80 + 53 = 133
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79 + 49 = 128
81 + 49 = 130
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30 + 99 = 129
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44 + 91 = 135
40 + 72 = 112
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3 × 43 = 129
43 × 3 = 129