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化简比并求比值.(1)12:30(2)0.4:3.2(3)23:518.

题目详情
化简比并求比值.
(1)12:30  
(2)0.4:3.2   (3)
2
3
5
18
化简比并求比值.
(1)12:30  
(2)0.4:3.2   (3)
2
3
5
18
化简比并求比值.
(1)12:30   (2)0.4:3.2   (3)
2
3
5
18
化简比并求比值.
(1)12:30  
(2)0.4:3.2  (3)
2
3
5
18
2
3
5
18
2
3
2233
5
18
5
18
551818
▼优质解答
答案和解析
(1)12:30,
=(12÷6):(30÷6),
=2:5;
 12:30,
=2:5,
2÷5,
=
2
5


(2)0.4:3.2,
=(0.4×5):(3.2×5),
=2:16,
=1:8;
0.4:3.2,
=1:8,
=1÷8,
=
1
8


(3)
2
3
5
18

=(
2
3
×18):(
5
18
×18),
=12:5;
2
3
5
18

=12:5,
=12÷5,
=
12
5
2
5
222555.

(2)0.4:3.2,
=(0.4×5):(3.2×5),
=2:16,
=1:8;
0.4:3.2,
=1:8,
=1÷8,
=
1
8


(3)
2
3
5
18

=(
2
3
×18):(
5
18
×18),
=12:5;
2
3
5
18

=12:5,
=12÷5,
=
12
5
1
8
111888.

(3)
2
3
5
18

=(
2
3
×18):(
5
18
×18),
=12:5;
2
3
5
18

=12:5,
=12÷5,
=
12
5
2
3
222333:
5
18

=(
2
3
×18):(
5
18
×18),
=12:5;
2
3
5
18

=12:5,
=12÷5,
=
12
5
5
18
555181818,
=(
2
3
×18):(
5
18
×18),
=12:5;
2
3
5
18

=12:5,
=12÷5,
=
12
5
2
3
222333×18):(
5
18
×18),
=12:5;
2
3
5
18

=12:5,
=12÷5,
=
12
5
5
18
555181818×18),
=12:5;
2
3
5
18

=12:5,
=12÷5,
=
12
5
2
3
222333:
5
18

=12:5,
=12÷5,
=
12
5
5
18
555181818,
=12:5,
=12÷5,
=
12
5
12
5
121212555.