计算下面各题,能简便的简便(1)8分之5*25分之4+6分之1/12分之5 (2)[1-(4分之1-8分之1)]*7分之5
2个回答
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(1)8分之5*25分之4+6分之1/12分之5
=5/8*4/25+1/6*12/5
=1/10+2/5
=1/10+4/5
=1/2
(2)[1-(4分之1-8分之1)]*7分之5
=[1-2/8+1/8]*5/7
=7/8*5/7
=5/8
2-13分之9+26分之15-4分之3
=2-18/26+15/26-3/4
=2-3/26-3/4
=2-6/52-39/52
=2-45/52
=59/52
=5/8*4/25+1/6*12/5
=1/10+2/5
=1/10+4/5
=1/2
(2)[1-(4分之1-8分之1)]*7分之5
=[1-2/8+1/8]*5/7
=7/8*5/7
=5/8
2-13分之9+26分之15-4分之3
=2-18/26+15/26-3/4
=2-3/26-3/4
=2-6/52-39/52
=2-45/52
=59/52
更多追问追答
追问
2-13分之9÷26分之15-4分之3最后一道题应该是
追答
2-13分之9+26分之15-4分之3
=2-18/26+15/26-3/4
=2-3/26-3/4
=2-6/52-39/52
=2-45/52
=59/52
=1又52分之7
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