求比值 8分之7比12分之5 2比7分之1 0.75比2 能简便就简便 【14分之5-7分之1】*2分之3

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8分之郑中7比12分之5 =7/8÷5/12=21/10

2比7分之1 =14

0.75比2 =3/8

【纤丛野14分之5-7分之1】*2分毁喊之3
=3/14x3/2

=9/28

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7/8 /知竖野 5/12
7/搭喊8x12/5
=21/10
2 /纤羡 1/7
=2x7
=14
0.75/2
=3/4 x 1/2
=3/8
(5/14-1/7)x3/2
=3/14 x 3/2
=9/28

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8分之7比12分之5

=8分之穗大7*5分之12
=10分之21

2比7分之1

=2*7
=14

0.75比2

=4分樱正之3*2分之1
=8分之3

【14分之5-7分之1】*2分之3

=【14分之5-14分之2】*2分之3
=14分之3*2分脊族悔之3
=28分之9

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