7.2/0.125+3.6/0.25+2/0.25
=7.2/(1/8)+3.6/(1/4)+2/(1/4)
=7.2*8+3.6*4+2*4
=3.6*16+3.6*4+8
=3.6(16+4)+8
=72+8
=80
7.2/0.125+3.6/0.25+2/0.25简算
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