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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