题目内容

化简:
①35:45
②360:450③0.3:0.15
④18:
2
3
⑤6:0.36
3
20
4
5
⑦0.6:
2
5
2
3
:6.
①35:45,
=(35÷5):(45÷5),
=7:9;

②360:450,
=(360÷90):(450÷90),
=4:5;

③0.3:0.15,
=(0.3×20):(0.15×20),
=6:3,
=2:1;

④18:
2
3

=(18×3):(
2
3
×3),
=54:2,
=27:1;

⑤6:0.36,
=(6×50):(0.36×50),
=300:18,
=(300÷6):(18÷6),
=50:3;

3
20
4
5

=(
3
20
×20):(
4
5
×20),
=3:16;

⑦0.6:
2
5

=(0.6×5):(
2
5
×5),
=3:2;

2
3
:6,
=(
2
3
×3):(6×3),
=2:18,
=1:9.
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