4158945簡算,14158945簡算

2021-03-04 05:38:34 字數 3177 閱讀 1982

1樓:妙酒

(1/4+1/5)×8/9÷4/5

=9/20x8/9x5/4

=2/5x5/4

=1/2

2樓:匿名使用者

五分之1乘以8除以80%

(5/8-1/4)÷(8/9+1/3)?

3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

(5/8-1/4)÷(8/9+1/3)

4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!

5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

6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

7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

7/8×4/5+1/5÷1/4簡便演算法

8樓:我不是他舅

=7/8×4/5+4/8

=(7/8+1)×4/5

=15/8×4/5

=3/2

9樓:匿名使用者

好無聊的題,這個眼睛看都能看出答案來的題居然還要求簡便演算法。

1/8x9/7+5/7÷8能簡算的要簡算

10樓:提莫送你超神

1/8x9/7+5/7÷8可以先將裡面的5/7÷8化成5/7×1/81/8x9/7+5/7×1/8

=1/8×(9/7+5/7)

=1/8×16/7

=2/7

11樓:凌月霜丶

1/8x9/7+5/7÷8能簡算的要簡算

1/8x9/7+5/7÷8

=1/8*(9/7+5/7)

=1/8*16/7

=2/7

12樓:張zq芹

1/8x9/7+5/7÷8

=1/8x(9/7+5/7)

=1/8x16/7

=2/7提取相同的因數,加數相加

簡便計算【要過程,要簡便】4/9÷【4/5-(1/5+1/3)】

13樓:匿名使用者

4/9÷【4/5-(1/5+1/3)】

=4/9÷(4/5-1/5-1/3)

=4/9÷(3/5-1/3)

=4/9÷(9/15-5/15)

=4/9÷4/15

=4/9×15/4

=5/3

能簡算的簡算,能簡算的簡算

4 7 容8 3 3 7 3 8 4 7x3 8 3 7x3 8 4 7 3 7 x3 8 1x3 8 3 8 5 8 7 9 3 8 7 9 5 8 3 8 7 9 1 7 9 9 7 5 6 7 13 6 13 6 5 5 6 5 6x7 13 7 13x5 6 5 6 5 6x 7 13 6 ...

163能簡算要簡算,216543能簡算要簡算?

2 1 6 5 4 3 能簡算要簡算 解題思路 不能進行簡便運算的按順序計算,簡便運算核心是運用加法和乘法各種定律進行計算,計算出整數部分方便後續計算的過程 解題過程 2 1 6 5 4 3 2 18 15 20 15 2 2 15 28 15 存疑請追問,滿意請採納 1 5 2 5 5 6 3 4...

能簡算簡算,不能簡算脫試49 102

99 32 100 1 32 100 32 1 32 3200 32 3232 計算下面各題,怎樣簡便就怎樣計算 49 102 2 49 125 76 8 8.33 2.43 4.57 103 32 6.7 2.63 4 49 102 2 49 49 102 2 49 100 4900 125 76...