数学几分之几?例:1 5 --- = --- = 0.5 2 10 12 ----= ---- = 25 1 ---= --- = 8

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数学几分之几?例:15---=---=0.521012----=----=251---=---=8数学几分之几?例:15---=---=0.521012----=----=251---=---=8数学

数学几分之几?例:1 5 --- = --- = 0.5 2 10 12 ----= ---- = 25 1 ---= --- = 8
数学几分之几?
例:1 5
--- = --- = 0.5
2 10
12
----= ---- =
25
1
---= --- =
8

数学几分之几?例:1 5 --- = --- = 0.5 2 10 12 ----= ---- = 25 1 ---= --- = 8
12 48
---- = ----- = 0.48
25 100
1 125
--- = ------ = 0.125
8 1000

1 5
--- = ---=50/100 = 0.5
2 10
12 24
----= ---- =48/100= 0.48
25 50
1 2
---= --- = 0.125
8 16

12/25=48/100=0.48
1/8=125/1000=0.125