45 加法 4 等于多少?
45 + 4 = 49
45加法4 等于 49
竖式演算
验算
- 用减法验算:49 − 4 = 45
- 用减法验算:49 − 45 = 4
相关题目
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44 + 4 = 48
46 + 4 = 50
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