=(1.25-0.8)/0.63-[(15/20)/(9/20)-7/5]
=(45/100)/(63/100)-(5/3-7/5)
=45/63-(25/15-21/15)
=5/7-4/15
=47/105
（5/4-0.8）/0.63-（3/4/0.45-7/5）
1个回答
相关问题
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1页 0.8*4= 2.6*7=2.05*3=12.4*4=2.3*2=0.8*5=1.25*6=0.04*5=7.63
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化简比.0.2:5 7.2:0.8 45:3分之4 0.45:9 7.2:0.8 0.18:0.
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7.63*5.4+6.37*5.4-17.5*5.35*0.8 简便计算
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有一组数列,3,0,0,0,5,5,0,0,5,6,4,0,1,0,0,5,3,4,8,6,5,6,4,7,8,0,9,
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直接写得数．4+2.7= 1.25×8= 6.4÷8= 0.63+0.27= 1÷3= 7+3.2= 5.5÷5= 4×
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1+2+3+4+5+6+7+8+9+0+45＝?
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口算下面各题． 5-0.64= 0.8+12.2= 0.2×0.3= 0.63÷9= 2.7+7.3= 10×0.45=
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解方程：6x+9x=45 3.6a+4.5a=56.7 4(0.8x)=7.2 3x+5*0.3=4.5 7.4x+12
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0.325*0.8+0.55/5/4-3/5/8/7=?(简算）