用簡便方法計算下列各題52,用簡便方法計算下列各題

2021-03-04 08:48:57 字數 2329 閱讀 5867

1樓:樂為人師

3/5+1/4+2/5

=(3/5+2/5)+1/4

=1+1/4

=1又1/4

11/12-(1/6-1/12)

=11/12+1/12-1/6

=1-1/6

=5/6

3/7+(5/6+4/7)

=3/7+4/7+5/6

=1+5/6

=1又5/6

9/5-(9/4+10/1)

5/9-(4/9+1/10)

=5/9-4/9-1/10

=1/9-1/10

=1/90

9/16+3/8+7/16+1/8

=(9/16+7/16)+(3/8+1/8)=1+1/2

=1又1/2

4/9+3/5+5/9+1/2

=(4/9+5/9)+(3/5+1/2)

=1+11/10

=2又1/10

用簡便方法計算下面各題6分之5+12分之1+12分之1、11分之4+5分之2+11分之7十5

2樓:心誠則靈

6分之5+12分之1+12分之1

=5/6+(1/12+1/12)

=5/6+1/6

=111分之4+5分之2+11分之7十5分之1=(4/11+7/11)+(2/5+1/5)=1+3/5

=1又3/5

8分之5+13分之5+13分之8+8分之3=(5/8+3/8)+(5/13+8/13)=1+1=2

遞等式計算題5/6-3/4+1/3 11/12-(1/6-1/8) 7/12-(3/4-1/2) 1/2-(3/4-3/8)

3樓:妙酒

您好:5/6-3/4+1/3

=10/12-9/12+4/12

=5/12

11/12-(1/6-1/8)

=22/24-4/24+3/24

=21/24

=7/8

7/12-(3/4-1/2)

=7/12-1/4

=1/3

1/2-(3/4-3/8)

=1/2-3/8

=1/8

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4樓:匿名使用者

5/6-3/4+1/3(通分)

=10/12-9/12+4/12

=1/12+4/12

=5/12

11/12-(1/6-1/8)

=11/12-1/6+1/8(通分)

=22/24-4/24+3/24

=18/24+3/24

=21/24(約分)

=7/8

7/12-(3/4-1/2)

=7/12-3/4+1/2(通分)

=7/12-9/12+6/12

=13/12-9/12

=4/12

=1/3

1/2-(3/4-3/8)

=1/2-3/4+3/8

=8/16-12/16+6/16

=14/16-12/16

=2/16

=1/8

5樓:匿名使用者

5/6-

3/4+1/3

=10/12-9/12+4/12

=(10-9+4)/12

=5/12

11/12-(1/6-1/8)

=11/12-2/12+1/8

=9/12+1/8

=3/4+1/8

=6/8+1/8

=7/8

7/12-(3/4-1/2)

=7/12-(3/4-2/4)

=7/12-1/4

=7/12-3/12

=4/12

=1/3

1/2-(3/4-3/8)

=1/2-(6/8-3/8)

=1/2-3/8

=4/8-3/8

=1/8

6樓:府玉蘭迮丙

1、計算題:

解:1/3÷5/6÷16/15

=1/3×6/5×15/16=3/8

[1-(1/5+1/6)]÷1/12 =[1-11/30]×12=19/30×12=38/5

(5/6-3/4)÷(1/4-1/8)=1/12÷1/8=1/12×8=2/3

應用題:

解:30÷5/6×8/9=36×8/9=32(千克)答:丙筐梨的質量是32千克.

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