ldcf.net
当前位置:首页 >> 7x9x(6/7一1/9)怎么简算? >>

7x9x(6/7一1/9)怎么简算?

7*9*(5/6-1/9) =7*9*5/6-7*9*1/9 =105/2-7 =91/2

=(1-6)X(1-15)X(1-27/2)X(1-63/5)X(1-4)X(1-27/7)X(1-15/4)X(1-11/3) =5X14X(1-27/2)X(1-63/5)X3X(1-27/7)X(1-15/4)X(1-11/3) =5X(1-63/5)X2X(1-27/2)X7X(1-27/7)X3X(1-11/3)X(1-15/4) =(-58)X(-25)X(...

9x6x(7/9-1/6) =9x6x7/9-9x6x1/6 =42-9 =33

=1/2×(1-1/3+1/3-1/5+1/5-1/7+17-1/9+1/9-1/11) =1/2×(1-1/11) =1/2×10/11 =5/11

-63800

如图

315/945+189/945+135/945+105/945=744/945=248/315

=7×1/7×9+7×1/9×9 =9+7 =16

1/1*3=0.5*(1-1/3) 1/3*5=0.5*(1/3-1/5) …… 1/49*51=0.5*(1/49-1/51) 换成这个形式,然后进行计算就。ok

2/9-7/16x2/9 =2/9x(1-7/16) =2/9x9/16 =2/16 =1/8 9/2-16/7x9/2 =9/2x(1-16/7) =9/2x(-9/7) =-81/14 谢谢,请采纳

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