脫式計算,能簡便的簡便

2021-05-16 10:41:06 字數 3208 閱讀 7136

1樓:新野旁觀者

脫式計算,能簡便的簡便:

1/3÷[(1/3+1/7)×2]

= 1/3÷[10/21×2]

= 1/3÷20/21

=7/20

脫式計算,能簡便的用簡便方法計算(要過程)

2樓:小橋阿水

(du1)7488÷

36*16

=208*16

=3328

(zhi2)5/11+5/8+6/11+3/8=(5/11+6/11)+(5/8+3/8)=1+1

=2(3)(5.4-2.4÷3)*0.5

=(5.4-0.8)*0.5

=4.6*0.5

=2.3

(4)1÷(

dao3/8+1/12)÷9/22

=1÷11/24÷9/22

=1×回24/11×22/9

=16/3

=5又1/3

(5)4/9*【0.75-(7/16-0.25)】答=4/9*[0.75+0.25-7/16]=4/9*[1-7/16]

=4/9*9/16

=1/4

(6)1985/2012*2013

=1985/2012*(2012+1)

=1985/2012*2012+1985/2012*1=1985+1985/2012

=1985又1985/2012

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

216÷[12÷(1/2-1/3)]脫式計算能簡便的簡便怎麼做?

4樓:數學愛好者

216÷[12÷(1/2-1/3)]脫式

來計算能簡便的簡源便怎麼做

解題思路:四則運算規則(按順序計算、先算乘除後算加減,有括號先算括號,有乘方先算乘方)即脫式運算(遞等式計算)需在該原則前提下進行

解題過程:

216÷[12÷(1/2-1/3)]=

216÷72=3

存疑請追問,滿意請採納

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/

5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.

6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

7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

脫式計算,能簡便的要簡便計算. 14-11.3-1.7 54÷2.5÷0.4 3.2×0.2

8樓:泡沫

(1)14-11.3-1.7,

=14-(11.3+1.7),

=14-13,

=1;(2)54÷2.5÷0.4,

=54÷(2.5×0.4),

=54÷1,

=54;

(3)3.2×0.28+0.28×6.8,=(3.2+6.8)×0.28,

=10×0.28,

=2.8;

(4)80.3-33.3×0.5÷0.37,=80.3-16.65÷0.37,

=80.3-45,

=35.3.

9樓:買群刀仕

3.6÷0.4-1.2×5

=9-6=3

90÷【3.6-1.8】=90/1.8=50

【31.6-11.7】÷2.

5÷0.4=【31.6-11.

7】÷(2.5*0.4)=【31.

6-11.7】÷1=31.7-0.

1-11.7=19.9

3.4×7.8÷3.9=3.4*(7.8÷3.9)=3.4*2=6.8

5.23×4+4.77÷0.25=5.23×4+4.77×4=(5.23+4.77)×4=10×4=40

基本思路就是結合法,分子分母同時放大等倍數

法,再簡單?那就用筆挨個做除法吧!這些很容易理解的,你可以好好的看一下!

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