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先化简,再求比值.0.35:40 0.21:7/8

0.35:40=(0.35×100):(40×100)=35:4000=(35÷5):(4000÷5)=7:800 0.21:7/8=(21/100×200):(7/8×200)=42:175=(42÷7):(175÷7)=6:25

化简比:20:8=(20÷4):(8÷4)=5:2求比值:20:8=20÷8=2.5满意望采纳谢谢

8.7:14.4 =(8.7×10):(14.4×10) =87:144 =(87÷3):(144÷3) =29:48 比值是:29/48

2:(5/8) =16:5 =3.2 7.7:2.8 =77:28 =11:4 =2.75 (8/3):(3/2) =16:9 =16/9 (15/2):10 =15:20 =3:4 =0.75 (3/4):0.6 =0.75:0.6 =75:60 =5:4 =1.25 1.75:8 =(7/4):8 =7:32 =7/32 2.5:(11/2) =5:11=5/11

(1)45:35=(45÷5):(35÷5)=9:7;45:35=9÷7=97;(2)27:25=(27×35÷2):(25×35÷2)=5:7;27:25=5:7=5÷7=57;(3)3.28=3.2:8=(3.2×5÷8):(8×5÷8)=2:5;3.28=3.2:8=2:5=2÷5=25.

0.35比8分之5=5/7:5/8=8:7=8/7 7比9分之4=63:4,比值63/4 0.4t比40kg =0.4×1000:40 =400:40 =10:1 比值=10 6cm比2.9km =6:2.9×1000×100 =6:290000 =3:145000 比值=3/145000

0.8:7/8 =6.4:7 =64/70 =32:35 =32/35

7/12:3/8=14/24:9/24=14/9 4.8:4 =(4*1.2):4=1.2 60:400 =(20*3):(20*20)=3/20=0.15 4:5/12 =(4*12):(5/12)*12=48:5=9.6 0.15:0.3 =0.15:(0.15*2)=1:2=0.5 0.125:7/8=1/8:7/8=1/7

8/7:12 =8/7÷12 =2:21

4/7:8 =4:56 =1:14

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