巧算:(10-7/55*1)+(9-7/55*2)+(8-7/55*3)……(1-7/55*10
巧算:(10-7/55*1)+(9-7/55*2)+(8-7/55*3)……(1-7/55*10
巧算:(10-7/55*1)+(9-7/55*2)+(8-7/55*3)+.+(1-7/55*10)
简便计算:1/55+2/55+3/55+4/55+5/55+6/55+7/55+8/55+9/55+10/55-11/1
简便计算,(10-7/55*1)+(9-7/55*2)+(8-7/55*3)+...+(1-7/55*10)
(10-7/55×1)+(9-7/55×1)+(8-7/55×1)+.+(1-7/55×1)怎么简算?
怎样简便计算 (10-7/55*1)+(9-7/55*2)+(8-7/55*3)+······+(1-7/55*10)
简算(10-55分之4×1)+(9-55分之4×2)+(8-55分之4×3)+……+(2-55分之4×1)+(1-55分
简算10-55分之4×1)+(9-55分之4×2)+(8-55分之4×3)+……+(2-55分之4×1)+(1-55分之
(1/55+2/55+3/55+~+10/55)-(11/155+12/155+~20/55)
(10-3/55×1)+(9-3/55×2)+(8-3/55×3)+……+(2-3/55×9)+(1-3/55×10)=
观察:1+2+3+4+5+6+7+8+9+10=(1+10)*(10÷2 )=11*5=55
(1+2+3+4+5+6+7+8+9+10)÷55=?