26.25+73.75*0.35+0.65*73.5用简便方法怎么算?明天就交了,

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26.25+73.75*0.35+0.65*73.5用简便方法怎么算?明天就交了,
26.25+73.75*0.35+0.65*73.5用简便方法怎么算?明天就交了,

26.25+73.75*0.35+0.65*73.5用简便方法怎么算?明天就交了,
如果最后一个是73.75:
26.25+73.75*0.35+0.65*73.75=26.25+73.75*(0.35+0.65)
=26.25+73.75*1
=100
如果最后一个是73.5:
26.25+73.75*0.35+0.65*73.5=26.25+73.75*0.35+0.65*(73.75-0.25)
=26.25+73.75*0.35+0.65*73.75-0.65*0.25
=26.25+73.75*(0.35+0.65)-0.1625
=100-0.1625
=99.8375