(10-7/55×1)+(9-7/55×1)+(8-7/55×1)+.+(1-7/55×1)怎么简算?对不起,我打错了 应该是:(10-7/55×1)+(9-7/55×2)+(8-7/55×3)+......+(1-7/55×10)怎么简算?
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(10-7/55×1)+(9-7/55×1)+(8-7/55×1)+.+(1-7/55×1)怎么简算?对不起,我打错了 应该是:(10-7/55×1)+(9-7/55×2)+(8-7/55×3)+......+(1-7/55×10)怎么简算?
(10-7/55×1)+(9-7/55×1)+(8-7/55×1)+.+(1-7/55×1)怎么简算?
对不起,我打错了 应该是:(10-7/55×1)+(9-7/55×2)+(8-7/55×3)+......+(1-7/55×10)怎么简算?
(10-7/55×1)+(9-7/55×1)+(8-7/55×1)+.+(1-7/55×1)怎么简算?对不起,我打错了 应该是:(10-7/55×1)+(9-7/55×2)+(8-7/55×3)+......+(1-7/55×10)怎么简算?
(10-7/55×1)+(9-7/55×1)+(8-7/55×1)+.+(1-7/55×1)
=(10+9+8+···1)-7/55×1×10
=(10+1)×10/2-14/11
=55-14/11
=55-1又3/11
=(54-1)+(1-3/11)
=53+8/11
=53又8/11
(10-7/55×1)+(9-7/55×1)+(8-7/55×1)+.+(1-7/55×1)怎么简算?
(10-7/55×1)+(9-7/55×1)+(8-7/55×1)+.+(1-7/55×1)怎么简算?对不起,我打错了 应该是:(10-7/55×1)+(9-7/55×2)+(8-7/55×3)+......+(1-7/55×10)怎么简算?
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,(10-7/55*1)+(9-7/55*2)+(8-7/55*3)+...+(1-7/55*10)
巧算( 10- 乘1)+ (9-55分之7 乘3) 加(8-55分之7乘10)
1+2+3+4+5+6+7+8+9+10=55对吗
怎样简便计算 (10-7/55*1)+(9-7/55*2)+(8-7/55*3)+······+(1-7/55*10)
10 减55分之7乘1的差加9 减 55分之7乘2的差(10-7/55*1)+(9-7/55*2)+(8-7/55*3)+……+(1-7/55*10)
[10-55分之7x1]+[9-55分之7x2]+[8-55分之7x3].+[1-55分之7x10]急.
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4×1)
1+3+5+7+9+...+59 1/99+2/99+...+55/99 急
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4×1
1.找规律,巧计算.(1-1/3)x(1-1/4)x(1-1/5)x……x(1-1/2009)x2009===解题思路:2.巧算.(10-7/55x1)+(9-7/55x2)+(8-7/55x3)+……+(1-7/55x10)==解题思路:
1/1*4+1/4*7+1/7*10+.+1/52*55*+1/55*58=?
1/1×4+1/4×7+1/7×10+.+1/52×55+1/55×58
规律:1,7,23,55,109,()
7:15,8:05,9:30,10:50,3:45,1:55分别用两种方式英语翻译