8括號143435,98括號

2021-03-04 04:38:07 字數 2697 閱讀 9983

1樓:妙酒

9/8x[1/4+3/4÷(3/5)]

=9/8x(1/4+5/4)

=9/8x3/2

=27/16

(5/8-1/4)÷(8/9+1/3)

2樓:妙酒

(5/8-1/4)÷(8/9+1/3)

=3/8÷11/9

=27/88

(5/8-1/4)÷(8/9+1/3)

3樓:匿名使用者

(5/8-1/4)÷(8/9+1/3)=3/8÷11/9=27/883/8+3/4×2/3÷6=3/8+1/2÷6=3/8+1/12=11/24

(1/4+1/5)×4×5=9/20×4×5=93/5+(1-7/10)÷3/20=3/5+3/10×20/3=3/5+2=13/5

4.5x+0.2x=6.1

4.7x=6.1

x=61/47

3/4x-1/3=5/6

3/4x=5/6+1/3

3/4x=7/6

x=14/9

希望你能採納,評為最佳答案,謝謝!

4樓:匿名使用者

1.原式=(5/8-2/8)÷(8/9+3/9)=(3/8)÷(11/9)=27/88

2.原式=3/8+1/2x1/6=3/8+1/12=9/24+2/24=11/24

3.原式=(5/20+4/20)x20=(9/20)x20=94.原式=3/5+(3/10)÷(3/20)=3/5+2=13/55.

原方程變為4.7x=6.1,解得:

x=61/476.原方程變為(3/4)x=5/6-1/3,即(3/4)x=1/2,所以x=(1/2)x(4/3)=2/3

5樓:世紀風霜

(5/8-1/4)÷(8/9+1/3)

=(5/8-2/8)÷(8/9+3/9)

=3/8÷11/9

=3/8×9/11

=27/88

3/8+3/4×2/3÷6

=3/8+1/2÷6

=3/8+1/2×1/6

=3/8+1/12

=9/24+2/24

=11/24

(1/4+1/5)×4×5

=1/4+×4×5+1/5×4×5

=1×5+1×4

=5+4

=93/5+(1-7/10)÷3/20

=3/5+3/10÷3/20

=3/5+2

=3/5+10/5

=13/5

4.5x+0.2x=6.1(方程)

4.7x=6.1

x=47/61

3/4x-1/3=5/6(方程)

3/4x=5/6+1/3

3/4x=5/6+2/6

3/4x=7/6

x=7/6÷3/4

x=7/6×4/3

x=14/9

6樓:淺愛琉璃

(5/8-1/4)÷(8/9+1/3)

=(5/8-2/8)÷(8/9+3/9)

=(3/8)÷(11/9)

=3/8 *9/11

=27/88

(5/8-1/4)÷(8/9+1/3)?

7樓:匿名使用者

①( 5/8 - 1/4 ) ÷ ( 8/9 + 1/3 )= ( 5/8 - 2/8 ) ÷ ( 8/9 + 3/9 )= 3/8 ÷ 11/9

= 3/8 ×

9/11

= 27/88

② 3/8 + 3/4 × 2/3 ÷ 6= 3/8 + 12/12 ÷ 6

= 3/8 + 6/12

= 3/8 + 1/2

= 3/8 + 4/8

= 7/8

③ (1/4 + 1/5)×4×5

= (1/4 + 1/5)× 20

= 1/4 × 20 + 1/5 × 20= 5 + 4

= 9④ 3/5 +(1 - 7/10)÷ 3/20= 3/5 + 3/10 × 20/3

= 3/5 + 60/30

= 3/5 + 2

= 3/5 + 10/5

= 13/5

⑤ 4.5x + 0.2x = 6.1

4.7 x = 6.1

x = 6.1 / 4.7

x = 61/47

⑥ 3/4x - 1/3 = 5/6

(3/4) x = 5/6 + 2/6

(3/4) x = 7/6

x = 7/6 ÷ 3/4

x = 7/6 × 4/3

x = 28/18

x = 14/9

3/8×(1/6+3/4÷3/5) (9/14-3/7)× (5/6+1/3) 怎樣簡便

8樓:匿名使用者

3/8×

(1/6+3/4÷3/5)

=3/8×(1/6+3/4×5/3)

=3/8×1/6+3/8×5/4

=1/16+15/32

=2/32+15/32

=17/32

(9/14-3/7)× (5/6+1/3)=(9/14-6/14)× (5/6+2/6)=3/14×7/6

=1/4

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