Question

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

Answer 1

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

Answer 2

26.25+73.75*0.35+0.65*73.5
=100-73.75+73.75*(1-0.65)+0.65*73.5
=100-73.75+73.75-73.75*0.65+0.65*73.5
=100+0.65*(73.5-73.75)
=100-0.65*0.25
=100-0.1625
=99.8375

你的题目应该错了，73.5应该是73.75

Answer 3

26.25+73.75*0.35+0.65*73.5
=26.25+73.75*(1-0.65)+0.65*73.5
=26.25+73.75-0.65*(73.75-73.5)
=100 -0.65*0.25
????????????????

Answer 4

题错了，最后一个数是73.75