37×1/4+18×0.25+45×25%
问题描述：
37×1/4+18×0.25+45×25%
2/15÷1又1/4+80%×2/15
尽快
答
37×1/4+18×0.25+45×25%
=（37+18+45）x0.25
=100x0.25
=25
2/15÷1又1/4+80%×2/15
=2/15x（4/5+0.8）
=2/15x4/5X2
=16/75
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