先简化,再求比值. 化简:1.5:2.1 14:35 5 8 : 5 6 6千米:300米 求比值:1.5:2.1 14:35 5 8 : 5 6 6千米:300米.
(1)1.5:2.1, =(1.5×10):(2.1×10), =15:21, =5:7; 1.5:2.1, =5:7, =5÷7, =
(2)14:35, =(14÷7):(35÷7), =2:5; 14:35, =2:5, =2÷5, =
(3)
=(
=15:20, =3:4;
=3:4, =3÷4, =
(4)6千米:300米, =6000米:300米, =20:1; 6千米:300米, =20:1, =20÷1, =20. |
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