67*0.25+2.5*3.75-4.5*0.25简算
1个回答
67*0.25+2.5*3.75-4.5*0.25
=67×0.25+0.25×37.5-4.5×0.25
=(67+37.5-4.5)×0.25
=100×0.25
=25
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