+9 25请写出方法。2 5请写出方法,2除以

2021-02-24 17:31:36 字数 4713 阅读 5024

1楼:匿名用户

1. 3/4-3/4÷3+9/25

=3/4-3/4×

1/3+9/25

= 3/4-1/4 +9/25

=1/2+9/25

=25/50+18/50

=43/50

2. 2/3÷1/2-5/3×2/5

= 2/3×2-2/3

= 2/3×(版

权2-1)

= 2/3

3. 2÷[(1+2/5)×3/7]

= 2÷(7/5×3/7)

= 2÷3/5

= 2×5/3

=10/3

4. 5/8×3/4+1/4×5/8+5/8= 5/8 ×(3/4+ 1/4+1)

= 5/8 ×2

=5/4

2-15/16÷5/7÷3/4 9/20÷[1/2×(2/5+4/5)] x-5/8x=1

2楼:咨询霍老师

2-15/16÷

5/7÷3/4

=2- 21/ 16 ÷3/4

=2- 7/4

=1/4 =0.25

9/20÷[1/2×(2/5+4/5)]

=9/20/[1/2×6/5]

=9/20×5/3

=3/4

x-5/8x=1/3×45

x-5/8x=15

3/8x=15

x=15÷8/3

x= 40

1/2x-1/3x+3/5x+2/5=5

1/6x +3/5x+2/5=5

23/30x+2/5=5

23/30x=5-2/5

23/30x=23/5

x=23/5 ÷23/30

x=60.8:4=x:8

0.8 ÷4=x ÷8

0.2=x ÷8

x=0.2×8

x=1.6

3楼:兖矿兴隆矿

2-15/16÷5/7÷3/4

=2-15/16*7/5*4/3

=2-7/4

=1/4

9/20÷[1/2×(2/5+4/5)]

=9/20/[1/2*6/5]

=9/20*5/3

=3/4

x-5/8x=1/3×45

3x/5=15

x=25

1/2x-1/3x+3/5x+2/5=5

(1/2-1/3+3/5)x=4.6

23x/30=4.6

x=6.9

0.8:4=x:8

4x=6.4

x=1.6

4楼:紫云千雪

1、2-15/16÷5/7÷3/4

=2-15/16*7/5*4/3

=2-7/4

=8/4-7/4

=1/4

2、9/20÷[1/2×(2/5+4/5)]=9/20/[1/2*6/5]

=9/20/3/5

=9/20*5/3

=3/4

3、x-5/8x=1/3×45

3/8x=15

x=15*8/3

x=40

4、1/2x-1/3x+3/5x+2/5=5(1/2-1/3+3/5)x=5-2/5

23/30x=23/5

x=65、0.8:4=x:8

4x=6.4

x=1.6

脱式计算,4/5÷[8×(1/2-2/5)],[1-(1/4+3/8)]÷1/4?

5楼:匿名用户

4/5÷[8×

(1/2-2/5)]

=4/5÷[8×1/10]

=4/5÷4/5

=1[1-(1/4+3/8)]÷1/4

=[1-5/8]÷1/4

=3/8÷1/4

=3/2

9×13×(5/13+5/9)

=9×13×5/13+9×13×5/9

=45+65

=110

6楼:妙酒

4/5÷[8×(1/2-2/5)]

=4/5÷(8x1/10)

=4/5÷4/5

=1[1-(1/4+3/8)]÷1/4

=(1-5/8)x4

=3/8x4

=3/2

9×13×(5/13+5/9)

=9x13x5/13+9x5/9x13

=9x5+5x13

=5x(9+13)

=5x22

=110

1/6+3/6 5/8-1/8 5/9*3/2 1÷1/5 2-1/4 2/3*9/8 1/2+1/8 2/3÷1/6 9*4/3 1/3÷4/3

7楼:匿名用户

1/6+3/6 =4/6=2/3

5/8-1/8 =4/8=1/2

5/9*3/2 =5/6

1÷1/5 =5

2-1/4 =1又3/4

2/3*9/8 =3/4

1/2+1/8 =5/8

2/3÷1/6 =2/3×

6=49*4/3 =12

1/3÷4/3=1/3×3/4=1/4。

8楼:冷眼看安康

1/6+3/6=2/3

5/8-1/8 =1/2

5/9*3/2 =5/6

1÷1/5=5

2-1/4 =7/4

2/3*9/8=3/4

1/2+1/8=5/8

2/3÷1/6=4

9*4/3=12

1/3÷4/3=1/4

9楼:匿名用户

1/6 3/6=4/6=3/2 5/8-1/8=4/8=1/2 5/9*3/2=5/6 1除以

1/5=5 2-1/4=8/4-1/4=7/4 2/3*9/8=3/4 1/2 1/8=4/8 1/8=5/8 2/3除以1/6=4 9*4/3=12 1/3除以4/3=1/4

(1/3-1/4)÷1/8+5/6 8-5/9-9/1*4 (1/2-1/3+1/6)*24 4/9÷{4/5-(1/5+1/3)} 简便运算

10楼:郭敦顒

郭敦顒回答:

(1/3-1/4)÷1/8+5/6= 8(1/3-1/4)+5/6=16/6-2+5/6=9/6=3/2。

8-5/9-9/1*4 =?此题似应是8-5/9-9/(1*4) =?(网络传送时最易引起误解,产生岐意),

8-5/9-9/(1*4) =8-2-5/9-1/4 =5+3/4-5/9=5+7/36。

(1/2-1/3+1/6)*24 =24/2-24/3+24/6=12-8+4=16。

4/9÷{4/5-(1/5+1/3)}=4/9÷=4/9×15/4=5/3。

11楼:匿名用户

(1/3-1/4)÷1/8+5/6

=(1/3-1/4)×

8+5/6

=1/3×8-1/4×8+5/6

=8/3-2+5/6

=2/3+5/6

=3/2

8-5/9-9/1*4

=8-5/9-4/9

=8-(5/9+4/9)

=8-1

=7(1/2-1/3+1/6)*24

=1/2×24-1/3×24+1/6×24=12-8+4

=84/9÷{4/5-(1/5+1/3)}=4/9÷

=4/9÷

=4/9÷4/15

=4/9×15/4

=5/3

(5/6-3/4)÷(2/3+4/9) (1-1/6×2/5)÷7/9

12楼:新野旁观者

(5/6-3/4)÷(2/3+4/9)

=1/12÷10/9

=3/40

(1-1/6×2/5)÷7/9

=(1-1/15)÷7/9

=14/15÷7/9

=6/5

(5/9+1/13)×9+4/13

=5/9×9+1/13×9+4/13

=5+(9/13+4/13)

=5+1

=65/4-(3/4-1/8)-3/8

=(5/4-3/4)-(3/8-1/8)

=1/2-1/4

=1/4

13楼:kz菜鸟无敌

(5/6-3/4)÷(2/3+4/9)

= (10/12-9/12)÷(6/9+4/9)=1/12÷10/9

=1/12 x 9/10

=3/40

~~~~~~ (1-1/6×2/5)÷7/9=(1-1/15) ÷ 7/9

=14/15 x 9/7

=6/5

~~~~~

(5/9+1/13)×9+4/13

=5/9 x 9 + 1/13 x 9 +4/13=5 + 9/13 + 4/13

=5 + 1

=6~~~~~

5/4-(3/4-1/8)-3/8

=5/4 - ( 6/8 - 1/8 ) - 3/8=5/4 - 5/8 -3/8

=5/4 - 1

=1/4

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