(1)有理数的加减混合运算的一般步骤是:(1)________;(2)_________;(3)________ _______;(4)__________________.
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![(1)有理数的加减混合运算的一般步骤是:(1)________;(2)_________;(3)________ _______;(4)__________________.](/uploads/image/z/1741672-64-2.jpg?t=%EF%BC%881%29%E6%9C%89%E7%90%86%E6%95%B0%E7%9A%84%E5%8A%A0%E5%87%8F%E6%B7%B7%E5%90%88%E8%BF%90%E7%AE%97%E7%9A%84%E4%B8%80%E8%88%AC%E6%AD%A5%E9%AA%A4%E6%98%AF%3A%281%29________%3B%282%29_________%3B%283%29________+_______%3B%284%29__________________.)
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