1樓:妙酒
(du-2又
zhi3/5)+(+3又dao1/4)+(-3又專2/5)+(+2又3/4)+(-1又1/2)+(-1又1/3)
=(3又1/4+2又3/4)
屬-(2又3/5+3又2/5)-1又1/2-1又1/3=6-6-1又3/6-1又2/6
=-2又5/6
2樓:匿名使用者
(-2又3/5)+(+3又1/4)+(-3又2/5)+(+2又3/4)+(-1又1/2)+(-1又1/3)
= -2+3-3+2-1-1-3/5+1/4-2/5+3/4-1/2-1/3
=-2又5/6
計算下面各題,能簡便的用簡便方法計算 5/9+3又1/6÷(3又1/4-1又2/3)×1又1/2
3樓:叫啥知不道
5/9+3又1/6÷(3又1/4-1又2/3)×1又1/2=5/9+19/6*12/19*3/2
=5/9+3
=3又5/9
3.5×1又1/4+1.25×27/10+3.8/(4/5)=1.25*(3.5+2.7+3.8)
=1.25*10
=12.5
3.2/【(2又3/4-19/36)/(1/5+30%)』】=3.2/(40/9)
=0.72
3/5-1/4+2/5-3/4 簡便計算(寫過程)
4樓:匿名使用者
此題主要運用:括號前面是減號時,新增括號或者去掉括號,括號裡面的符號都變號。
3/5-1/4+2/5-3/4
=(3/5+2/5)-(1/4+3/4)
=1-1=0
簡便計算:1又2/5+10又6/7+4.6+4又1/7+12/7-(5/7+1/2)和1又1/2+2又1/3+3又1/4+4又1/5+5又1/6
5樓:新野旁觀者
1又2/5+10又6/7+4.6+4又1/7+12/7-(5/7+1/2)
=(1又2/5+4.6)+(10又6/7+4又1/7)+(12/7-5/7+1/2)
=6+15+1.5
=22.5
1又1/2+2又1/3+3又1/4+4又1/5+5又1/6=(1+2+3+4+5)+(1/2+1/3+1/6)+(1/4+1/5)
=15+1+9/20
=16又9/20
簡便運算(-3/4-5/6+7/8)*(-24) (-3/5)*3/5+8/25*(-24) (2*3*4*5 )*(1/2+1/3+1/4+1/5)
6樓:我不是他舅
(-3/4-5/6+7/8)
*(-24)
=-3/4*(-24)-5/6*(-24)+7/8*(-24)=18+20-21
=17(-3/5)*3/5+8/25*(-24)=-9/25-8*24/25
=-3*3/25-64*3/25
=(-3-64)*3/25
=-67*3/25
=-201/25
=-8又1/25
(2*3*4*5 )*(1/2+1/3+1/4+1/5)=(2*3*4*5 )*1/2+(2*3*4*5 )*1/3+(2*3*4*5 )*1/4+(2*3*4*5 )*1/5
=3*4*5+2*4*5+2*3*5+2*3*4=60+40+30+24
=154
7樓:匿名使用者
簡便運算:
(-3/4-5/6+7/8)
*(-24)
=-3/4*(-24)-5/6*(-24)+7/8*(-24)=18+20-21
=17(-3/5)*3/5+8/25*(-24)=-9/25-8*24/25
=-3*3/25-64*3/25
=(-3-64)*3/25
=-67*3/25
=-201/25
(2*3*4*5 )*(1/2+1/3+1/4+1/5)=(2*3*4*5 )*1/2+(2*3*4*5 )*1/3+(2*3*4*5 )*1/4+(2*3*4*5 )*1/5
=3*4*5+2*4*5+2*3*5+2*3*4=60+40+30+24
=154
8樓:匿名使用者
(-3/4-5/6+7/8)
*(-24)
=-3/4*(-24)-5/6*(-24)+7/8*(-24)=18+20-21
=17(-3/5)*3/5+8/25*(-24)=-9/25-8*24/25
=-3*3/25-64*3/25
=(-3-64)*3/25
=-67*3/25
=-201/25
=-8又1/25
``````````````
(2*3*4*5 )*(1/2+1/3+1/4+1/5)=(2*3*4*5 )*1/2+(2*3*4*5 )*1/3+(2*3*4*5 )*1/4+(2*3*4*5 )*1/5
=3*4*5+2*4*5+2*3*5+2*3*4=60+40+30+24
=154
wsdfghf
9樓:
(-3/4-5/6+7/8)*(-24)=(1/8-5/6)*(-24)=-3+20=17
(-3/5)*3/5+8/25*(-24)=1/25*(-9-8*24)=-201/25
(2*3*4*5 )*(1/2+1/3+1/4+1/5)=3*4*5+2*4*5+2*3*5+2*3*4=60+40+30+24=154
不簡便:3/5+1/3+2/5+7/12= 13/15-(7/15-1/4)= 簡便:5/12+1/3+7/12+2/3= 7/9-(4/9+1/3)=
10樓:匿名使用者
不簡便bai:
3/5+1/3+2/5+7/12
解,du得:zhi
==3/5+2/5+7/12+4/12
==1+11/12
==1又11/12
13/15-(7/15-1/4)
解,得:
==13/15-7/15+1/4
==2/5+1/4
==0.4+0.25
==0.65
簡便:dao
5/12+1/3+7/12+2/3
解,得:
==(5/12+7/12)+(2/3+1/3)==1+1
==27/9-(4/9+1/3)
解,得:
==7/9-4/9-1/3
==1/3-1/3==0
3/5+1/2*4/5和(5/6-2/3)*10的簡便運算
11樓:算神荀彧
沒什麼簡便運算,1/2*4/5=(1/2)*(4/5)=2/5,再加上3/5就等於1;
第二題=(5/6-4/6)*10=1/6*10=5/3
12樓:妙酒
3/5+1/2*4/5
=3/5+2/5
=1(5/6-2/3)*10
=(5/6-4/6)x10
=1/6x10
=5/3
13樓:謝紹林高山流水
3/5+1/2*4/5
=1/5(3+1/2*4)
=1/5*(3+2)
=1/5*5
=1(5/6-2/3)*10
=(5/6-4/6)*10
=10*1/6
=5/3
=1又3分之2
14樓:匿名使用者
這類題最簡便的方法就是同分,合併,算出結果
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