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\(( - 1.5) + 4\frac{1}{4} + 2.75 + ( - 5\frac{1}{2})\)
参考答案:解:原式\( = [( - 1.5) + ( - 5\frac{1}{2})] + (4\frac{1}{4} + 2.75)\)\( = - 7 + 7\)\( = 0\).
解析:
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