化简下面各比,并求比值154:770.25:235:565.6:1.1267:0.66厘米:0.8米.-数学
题文
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答案
(1)154:77 =(154÷77):(77÷77) =2:1 154:77 =154÷77 =2; (2)0.25:2 =(0.25÷0.25):(2÷0.25) =1:8 0.25÷2 =0.25÷2 =
(3)
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=18:25
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=
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(4)5.6:1.12 =(5.6÷1.12):(1.12÷1.12) =5:1 5.6:1.12 =5.6÷1.12 =5. (5)
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=(
=30:21 =(30÷3):(21÷3) =10:7
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(6)6厘米:0.8米 =6厘米:80厘米 =(6÷2):(80÷2) =3:40 6厘米:0.8米 =6厘米÷80厘米 =6÷80 = |