jjdp.net
当前位置:首页 >> 3/7%(1/2%3/7)+1/2 5/8×10/11%8/1x10/5 简便运算。 >>

3/7%(1/2%3/7)+1/2 5/8×10/11%8/1x10/5 简便运算。

简便运算(3/7十2/5)÷(3/7一2/5)=29/35÷1/35=29

3/7+1/2-3/7简便计算=(3/7-3/7)+1/2=1/2;5/7-1/6+5/14简便计算7=(10/14+5/14)-1/6=15/14-1/6=90/84-14/84=76/84;=19/21;7/12-(5/6-5/12)简便计算=(7/12+5/12)-5/6=1-5/6=1/6;2/3-1/2-1/18=12/18-9/18-1/18=2/18=1/9;2X-1/8=7/8 2x=1;x=1/2;X-1/9-

1 8.7%*2.5+7.5*0.087=0.087*2.5+7.5*0.087=0.087*(2.5+7.5)=0.87 2 (7/9+4/15-3/5)*4 先算4/15-3/5 或者直接硬算3 80%÷[62.5%*(1-20%)] =80%÷[62.5%*0.8】=62.5%4硬算5先减后加同16硬算伙计,要记公式啊.

(7/10+1/2)÷3/8-1/5 =(7/10+1/2)*8/3-1/5 =7/10*8/3+1/2*8/3-1/5 =28/15+4/3-1/5 =28/15+20/15-3/15 =45/15 =3 8/45*5/8+3/7÷9/28 =8/45*5/8+3/7*28/9 =1/9+4/3 分数乘法可以约简 =1/9+12/9 =13/9 3/10÷(2/5+4/15)-1/5 =3/10÷(6/15+4/15)-1/5 括号前是除法的,只能先算括号内的.=3/10÷10/15-1/5 =3/10*15/10-1/5 =45/100-20/100 =25/100 =1/4

计算下面各题,能简算的要简算1/2+4/7+3/7 =1/2+(4/7+3/7)=1/2+1=1又1/21/10+3/8-2/5 =19/40-2/5=3/401-(2/3+1/8) =1-2/3-1/8=1/3-1/8=5/247/8-(2/3-1/4) =7/8+1/4-2/3=9/8-2/3=11/241/9+(1/6+2/9)+5/6=(1/9+2/9)+(1/6+5/6)=1/3+1=1又1/3

0.75*6.3+3.7*75% =0.75*6.3+3.7*0.75=0.75*(6.3+3.7)=0.75*10=7.56.67*1.5+3.33/0.67这里只能假设0.67=2/3,否则无法简算=6.67*1.5+3.33/(2/3)=6.67*1.5+3.33*(3/2)=6.67*1.5+3.33*1.5=1.5*(6.67+3.33)=1.5*10=15

(3/7+3/8+5/9+7/10)÷(3/7+3/8+5/9)=(3/7+3/8+5/9+7/10)÷3\7+(3/7+3/8+5/9+7/10)÷3\8+(3/7+3/8+5/9+7/10)÷5\9=3/8+5/9+7/10+3/7+5/9+7/10+3/7+3/8+7/10=(3\8+3\8)+(5\9+5\9)+(7\10+7\10+7\10)+(3\7+3\7)=3\4+10\9+21\10+6\7之后你可以用计算器算一下了

7/4+7/8-3/7+1/8=(4/7-3/7)+(7/8+1/8)=1/7+1=8/7 5/8+3/10-1/8+7/10=(5/8-1/8)+(3/10+7/10)=1/2+1=1.5

9/14÷(1/3*6/7-1/14)=9/14÷(2/14-1/14)=9/14÷1/14=9/14*14=9 1/7+7/8*5/7-3/8=1/7+5/8-3/8=1/7+1/4=4/28+7/28=11/28 【1/2+(3/4-3/5)】÷7/10 =[1/2+(15/20-12/20)]÷7/10=(1/2+3/20)÷7/10 =13/20*10/7 =13/14

1/3+3/4+2/5+5/7+7/8+9/20+10/21+11/24+12/35 =1/3+3/4+2/5+5/7+7/8+(5/20+4/20)+(3/21+7/21)+(3/24+8/24)+(5/35+7/35) =1/3+3/4+2/5+5/7+7/8+1/4+1/5+1/7+1/3+1/8+1/3+1/7+1/5 =(1/3*3)+(3/4+1/4)+(2/5+1/5+1/5)+(5/7+1/7+1/7)+(7/8+1/8) =1+1+4/5+1+1 =四又五分之四 =4.8

相关文档
网站首页 | 网站地图
All rights reserved Powered by www.jjdp.net
copyright ©right 2010-2021。
内容来自网络,如有侵犯请联系客服。zhit325@qq.com