Question

用脱式计算：（3分之2-4分之1*2）/3分之1 80%-5*20%/250% 7.5*10分之3+1.5*30%+0.3 （80%-35%）*5分之3

还有：4分之1*5分之3/4分之1*5分之3 3*（15分之2+12分之1）-5分之2
（1-75%）*（1+4分之1） （4分之3*3分之2）/20%+4分之3
急！！！！！！！！！！！！！！！！！！！！！！~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
谁能又快又好地算出来我就采谁！！！！！！！

Answer 1

[2/3-(1/4)*2]/(1/3)
=[2/3-1/2]*3
=(4/6-3/6)*3
=(1/6)*3
=1/2

80%-5*20%/250%
=80%-100/250
=80%-40%
=40%

7.5*(3/10)+1.5*30%+0.3
=1.5*(3/2)+1.5*0.3+0.3
=1.5*(1.5+0.3)+0.3
=1.5*1.8+0.3
=2.7+0.3
=3

（80%-35%）*(3/5)
=(0.8-0.35)*(0.6)
=0.45*0.6
=0.27

(1/4)*(3/5)/(1/4)*(3/5)
=(3/5)*(3/5)
=9/25

3*(2/15+1/12)-2/5
=3*(8/60+5/60)-2/5
=3*(13/60)-2/5
=13/20-8/20
=5/20
=1/4

（1-75%）*（1+1/4）
=0.25*5/4
=(1/4)*(5/4)
=5/16

[（3/4)*(2/3）]/20%+3/4
=(1/2)/0.2+(3/4)
=(1/2)/(1/5)+3/4
=5/2+3/4
=10/4+3/4
=13/4.

Answer 2

[2/3-(1/4)*2]/(1/3)
=[2/3-1/2]*3
=(4/6-3/6)*3
=(1/6)*3
=1/2

80%-5*20%/250%
=80%-100/250
=80%-40%
=40%

7.5*(3/10)+1.5*30%+0.3
=1.5*(3/2)+1.5*0.3+0.3
=1.5*(1.5+0.3)+0.3
=1.5*1.8+0.3
=2.7+0.3
=3

（80%-35%）*(3/5)
=(0.8-0.35)*(0.6)
=0.45*0.6
=0.27

(1/4)*(3/5)/(1/4)*(3/5)
=(3/5)*(3/5)
=9/25

3*(2/15+1/12)-2/5
=3*(8/60+5/60)-2/5
=3*(13/60)-2/5
=13/20-8/20
=5/20
=1/4

（1-75%）*（1+1/4）
=0.25*5/4
=(1/4)*(5/4)
=5/16

[（3/4)*(2/3）]/20%+3/4
=(1/2)/0.2+(3/4)
=(1/2)/(1/5)+3/4
=5/2+3/4
=10/4+3/4
=13/4

Answer 3

（3分之2-4分之1*2）/3分之1 等于2分之1 4分之1*5分之3/4分之1*5分3等于 1 3*（15分之2+12分之1）-5分之2等于4分之1
（1-75%）*（1+4分之1）等于16分5 （4分之3*3分之2）/20%+4分之3等于19分之10

Answer 4

（3分之2-4分之1*2）/3分之1
=1/6÷1/3
=1/2
80%-5*20%/250%
=80%-100%/250%
=80%-40%
=40%

7.5*10分之3+1.5*30%+0.3
=2.25+0.45+0.3
=3

(80%-35%）*5分之3
=0.45*0.6
=0.27

4分之1*5分之3/4分之1*5分之3
=4分之1/4分之1*5分之3 *5分之3
=9/25

3*（15分之2+12分之1）-5分之2
=3*15分之2+3*12分之1-5分之2
=2/5+1/4-2/5
=1/4

（1-75%）*（1+4分之1）
=1/4*5/4
=5/16

（4分之3*3分之2）/20%+4分之3
=4分之3*(3分之2/20%)+4分之3
=4分之3*1/15+4分之3
=4分之3*(1+1/15)
=3/4*16/15
=4/5

Answer 5

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Answer 6

呵呵