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乘法运算可用加法和移位两种操作实现，而除法运算可用减法加移位操作实现。

【参考答案】

乘法运算可以通过重复加法来实现。例如，如果我们想要计算 3 乘以 4，我们可以将 3 加到自己上 4 次，即 3 + 3......

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