问题标题:
【3又3/5X(0.25+1又1/15)/2.4】
问题描述:
3又3/5X(0.25+1又1/15)/2.4
黄业清回答:
3又3/5*(0.25+1又1/15)/2.4
=18/5*[5(1/4+16/15)]/12
=[3(1/4+16/15)]/2
=[3(15/60+64/60)]/2
=15/10+64/10
=7.9
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