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化简:18a-8a=______.-数学
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化简:239x+6x4-2x1x(x>0)-数学
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27-13+12.-数学
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18-72+50.-数学
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计算:12-27+75-数学
题目简介
212-413+43-27.-数学
题目详情
答案
=(4-
=