1,2.3.4.5.1.2.3.4.5.1.2.3.4.5.
简便计算:23.5乘5.66减23.4乘5.67 1.2/(1.2/2.3)/(2.3/3.4)/(3.4/4.5)
2.3.4.5.1.2.3.4求思路.可拍照.
1.2+2.3+3.4+4.5+5.612+23+34+45+56
1.2,2.3,3.4,4.5,5.6,(),( )找规律填空
1+1/2.3+1/3.4+1/4.5+.+1/2008.2009
(1.2+2.3+3.4+4.5+5.6+6.7)/(12+23+34+45+56+67)
1.2+2.3+3.4+4.5+5.6+6.7+7.8/12+23+34+45+56+67+78
计算:1.2+2.3+3.4+4.5+5.6+6.712+23+34+45+56+67.
分数51/50在数列 1/1,2/1 ,1/2.3/1.2/2.1/3.4/1.3/2.2/3.1/4.5/1.排第多少
2.3.4.5题,
2.3.4.5.6.
2.3.4.5.6对吗