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按照下面的条件列出比例,并且解比例

(1)x:10=6:12 x=5(2)2:9= :x x=

6:10=15:x 6x=10×15 6x÷6=150÷6 x=25答:x是25.

x:4分之1=3分之1:3分之2 解:3分之2x=3分之1×4分之1 x=12分之1×2分之3 x=8分之1

96:x=16:5 解:16x=96×5 x=480 ÷16 x=30

20:40=3:6 40:20=6:3 20:3=40:6 3:20=6:40 3:6=20:40 6:3=40:20 40:6=20:3 6:40=3:20 请好评 ~在右上角点击【评价】,然后就可以选择【满意,问题已经完美解决】了。 如果你认可我的回答,敬请及时采纳, ~你的采纳是我前进的动力~~ ~如还有新...

5.6:4=8:x 5.6x=4*8 5.6x=32 x=32÷5.6 x=40/7 x*0.5=3/4*3/4 x/4=9/4 x=9

6:8=x:12 8x=6×12 8x=72 x=9

第2题: 解:设实际要x天可以运完。 42∶2=(18×84)∶x 42x=2×18×84 x=2×18×84÷42 x=72 答:实际要72天运完。 第3题: 解:设修完这段公路实际用了x天。 1440∶5=(180×40)∶x 1440x=5×180×40 x=5×180×40÷1440 x=25 答:修完这段公路实际用了25天。

速度和=340÷4=85千米/小时; 甲速度=85×8÷(8+9)=40千米/小时; 乙速度=85-40=45千米/小时; 您好,很高兴为您解答,skyhunter002为您答疑解惑 如果本题有什么不明白可以追问,如果满意记得采纳 如果有其他问题请采纳本题后另发点击向我求助,答...

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