98 加法 23 等于多少？
98 + 23 = 121
98加法23 等于 121
竖式演算
验算
- 用减法验算：121 − 23 = 98
- 用减法验算：121 − 98 = 23
相关题目
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97 + 23 = 120
99 + 23 = 122
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22 + 99 = 121
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