49 加法 79 等于多少？
49 + 79 = 128
49加法79 等于 128
竖式演算
验算
- 用减法验算：128 − 79 = 49
- 用减法验算：128 − 49 = 79
相关题目
49 + 78 = 127
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29 + 99 = 128
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