21 加法 53 等于多少？
21 + 53 = 74
21加法53 等于 74
竖式演算
验算
- 用减法验算：74 − 53 = 21
- 用减法验算：74 − 21 = 53
相关题目
21 + 52 = 73
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21 + 56 = 77
21 + 50 = 71
21 + 57 = 78
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20 + 53 = 73
22 + 53 = 75
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23 + 53 = 76
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2 + 72 = 74
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41 + 18 = 59
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