4 加法 7 等于多少？
4 + 7 = 11
4加法7 等于 11
竖式演算
验算
- 用减法验算：11 − 7 = 4
- 用减法验算：11 − 4 = 7
相关题目
4 + 6 = 10
4 + 8 = 12
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