-2.5+(-1/5)0.4-(-1/4)+1/61/3-(-查字典问答网

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　　-2.5+(-1/5)0.4-(-1/4)+1/61/3-(-5/6)+2/31/3+(-1/5)+1+2/3========27-18+(-7)-320.5+(-1/4)-(-2.75)+1/2====

　　-2.5+(-1/5)0.4-(-1/4)+1/61/3-(-5/6)+2/31/3+(-1/5)+1+2/3

　　====

　　27-18+(-7)-320.5+(-1/4)-(-2.75)+1/2

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2020-03-22 18:40

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冯春燕

　　-2.5+(-1/5)0.4-(-1/4)+1/61/3-(-5/6)+2/31/3+(-1/5)+1+2/3

　　=-2.5-0.2=13/20+1/6=7/6+4/6=2/15+1+10/15

　　=-2.7=49/60=11/6=9/5

　　27-18+(-7)-320.5+(-1/4)-(-2.75)+1/2

　　=27-18-7-32=0.5-0.25+2.75+0.5

　　=-30=3.5

2020-03-22 18:44:42

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