(1/55+2/55+3/55+~+10/55)-(11/155+12/155+~20/55)
1个回答
(1/55+2/55+3/55+~~~~~+10/55)-(11/155+12/155+~~~20/155)
=(1+10)*5/55-(11+20)*5/155
=1-1
=0
相关问题
计算 1/55+2/55+3/55+.+10/55-11/155-12/155-.-20/155
1/55+2/55+3/55+.+10/155-11/155-12/155-.-20/155=?
如下题1/55+2/55+3/55+……+10/55-11/155-12/155-13/155-……-20/155
(1) 1/55+2/55+……+9/55+10/55-11/155-12/155-……-19/155-20/155
巧计算 1/55+2/55+3/55+.+10/55-11/155-12/155-13/155-...-20/155 怎
-55+(-54)+(-53)+...+(-155)(过程)
(10-2/55*1)+(9-2/55*2)+(8-2/55*3)+...+(1-2/55*10)=
简便计算,(10-7/55*1)+(9-7/55*2)+(8-7/55*3)+...+(1-7/55*10)
(10-55/2×1)+(9-55/2×2)+(8-55/2×3)+……+(1-55/2×10)
计算题(简便运算) (20-2/55×1)+(19-2/55×2)+(18-2/55×3)+…+(1-2/55×20)=