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11x68%-0.68简算,脱式5.8x19%-0.19x4.2简算,脱式(0.25+62.5)/(1.75-87.5%)简算,脱式

题目详情
11x68%-0.68简算,脱式
5.8x19%-0.19x4.2简算,脱式
(0.25+62.5)/(1.75-87.5%)简算,脱式
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答案和解析
11x68%-0.68
=11x0.68-0.68
=(11-1)x0.68
=6.8
5.8x19%-0.19x4.2
=5.8x0.19-0.19x4.2
=(5.8-4.2)x0.19
=0.304
(0.25+62.5)/(1.75-87.5%)
=(25+6250)/(175-87.5)
=(6275)/(87.5)
=71.7