4131脫式計算,脫式計算,能簡便要簡便。

2021-05-22 23:43:29 字數 2665 閱讀 4221

1樓:樂為人師

2×[(3/8-3/4×1/3)÷1/4]=2×[(3/8-1/4)÷1/4]

=2×[1/8÷1/4]

=2×1/2=1

2樓:匿名使用者

2×[(3/8-3/4×1/3)÷1/4]=2×[(3/8-1/4)x4]

=2×[1/8x4]

=2×1/2

=1謝謝,請採納

脫式計算,能簡便要簡便。 3/5×1/5÷3/5 2/7-5/8×2/7 1/4÷2/3+2/3÷

3樓:匡吉月卷翼

脫式計算,能簡便要簡便。

3/5×1/5÷3/5

=3/5÷3/5×1/5

=1/5

2/7-5/8×2/7

=(1-5/8)×2/7

=3/8×2/7

=3/28

1/4÷2/3+2/3÷4

=3/2÷4+2/3÷4

=(3/2+2/3)÷4

=13/6÷4

=13/24

1/3÷1/5+4/5

=5/3+4/5

=37/15

[1-(1/4+3/8)]÷1/4

=(1-5/8)×4

=3/8×4

=3/2

4/9×3/16+5/12

=1/12+5/12

=1/2

3/9-1/3×3/9

=(1-1/3)×1/3

=2/9

解方程1/2x÷1/4=8

1/2x=2

x=41/4x+2/3=3

1/4x=3-2/3

1/4x=7/3

x=28/3

1/3x+1/2x=5

5/6x=5

x=62/5x+1/3×6=4

2/5x=4-2

2/5x=2

x=52/7x=1/2×3/14

2/7x=3/28

x=3/8

4.5x+x=11/17

5.5x=11/17

x=2/17

x-1/12x=22

11/12x=22

x=24

脫式計算 (2-2/3)×2/9÷4 9/16÷(3/8+1/16)

4樓:瀛洲煙雨

(2-2/3)×2/9÷4

=4/3×1/4×2/9

=1/3×2/9

=2/27

5樓:丹凝心孝芙

你的題目好象少了項9×(6×8)啊

呵呵,如果是這樣的話,原式=(2×3)(1+4+9+16)/(2×3)(1+4+9+16)(2×4)=1/8

脫式計算,4/5÷[8×(1/2-2/5)],[1-(1/4+3/8)]÷1/4?

6樓:匿名使用者

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

7樓: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

脫式計算(能簡算的要簡算) (1)1/4÷(2/3-3/2×1/3) (2)24×(1/6+3/8+7/

8樓:昨夜星辰吉日

(1)1/4÷(2/3-3/2×1/3)

=1/4÷(2/3-1/2)=1/4÷(4/6-3/6)=1/4÷1/6=1/4x6=6/4=3/2;

(2)24×(1/6+3/8+7/12)=24x1/6+24x3/8+24x7/12=4+9+14=27;

(3)1/8×58+1/8×41+1/8=1/8x(58+41+1)=1/8x100=100/8=12.5.

9樓:

(1)1/4÷(2/3-3/2×1/3)=3/2

(2)24×(1/6+3/8+7/12)=27

(3)1/8×58+1/8×41+1/8=25/2

10樓:匿名使用者

(1)1/4÷(2/3一3/2×1/3)=1/4÷(4/6一3/6)=1/4×6/1=3/2

8/9÷(4/3-1/3÷1/2)脫式計算,能簡算的要簡算

11樓:匿名使用者

原式=8/9÷(4/3-2/3)

=8/9÷2/3

=8/9 ×3/2

=4/3

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