4 加法 4 等于多少?
4 + 4 = 8
4加法4 等于 8
竖式演算
验算
- 用减法验算:8 − 4 = 4
- 用减法验算:8 − 4 = 4
相关题目
4 + 3 = 7
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4 + 8 = 12
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