能简便的用简便方法计算
24*0.25*31760-1040÷(704-688)(7分之5减2分之1)÷10分之3*25分之80.39÷[(5分之1+2.4)÷3分之2]谢谢大家了...
24*0.25*31 760-1040÷(704-688) (7分之5减2分之1)÷10分之3*25分之8 0.39÷[(5分之1+2.4)÷3分之2]
谢谢大家了 展开
谢谢大家了 展开
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24*0.25*31
=24X1/4X(30+1)
=6X30+6X1
=180+6
=186
760-1040÷(704-688)
=760-1040÷(700-688+4)
=760-1040÷ 16
=760-1040÷ 4÷ 4
=760-260÷ 4
=760-65
=760-60-5
=700-5
=695
(7分之5减2分之1)÷10分之3*25分之8
(5/7-1/2)÷(3/10X8/25)
=3/14÷12/125
=125/56
=(112+13)/56
=2+13/56
=2又13/56
0.39÷[(5分之1+2.4)÷3分之2]
0.39÷[(1/5+2.4)÷2/3]
=0.39÷[2+3/5]÷2/3
=0.39÷[(2÷2/3)+(3/5÷2/3)]
=0.39÷[3+9/10]
=0.39÷3.9
=0.1
=24X1/4X(30+1)
=6X30+6X1
=180+6
=186
760-1040÷(704-688)
=760-1040÷(700-688+4)
=760-1040÷ 16
=760-1040÷ 4÷ 4
=760-260÷ 4
=760-65
=760-60-5
=700-5
=695
(7分之5减2分之1)÷10分之3*25分之8
(5/7-1/2)÷(3/10X8/25)
=3/14÷12/125
=125/56
=(112+13)/56
=2+13/56
=2又13/56
0.39÷[(5分之1+2.4)÷3分之2]
0.39÷[(1/5+2.4)÷2/3]
=0.39÷[2+3/5]÷2/3
=0.39÷[(2÷2/3)+(3/5÷2/3)]
=0.39÷[3+9/10]
=0.39÷3.9
=0.1
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