2÷(1×3)+2÷(3×5)+2÷(5×7)+2÷(7×9)=
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2÷(1×3)+2÷(3×5)+2÷(5×7)+2÷(7×9)=2÷(1×3)+2÷(3×5)+2÷(5×7)+2÷(7×9)=2÷(1×3)+2÷(3×5)+2÷(5×7)+2÷(7×9)==1-1
2÷(1×3)+2÷(3×5)+2÷(5×7)+2÷(7×9)=
2÷(1×3)+2÷(3×5)+2÷(5×7)+2÷(7×9)=
2÷(1×3)+2÷(3×5)+2÷(5×7)+2÷(7×9)=
=1-1/3+1/3-1/5+1/5-1/7+1/7-1/9+1/9-1/11+1/11-1/13+1/13-1/15
=1-1/15
=14/15
请问1÷(2÷3)÷(3÷4)÷(4÷5)÷...÷(2008÷2009)÷(2009÷2010)怎么做?
x÷2=(3x-1)÷5
1÷(2÷3)÷(3÷4)÷(4÷5)÷…÷(99÷100),计算
1÷(2÷3)÷(3÷4)÷(4÷5)÷.÷(1999÷2000)=
1÷(2÷3)÷(3÷4)÷(4÷5)÷...÷(2008÷2009)÷(2009÷2010)怎么做
1÷3/2÷4/3÷5/4÷.÷51/50(简便计算)
(2÷3+3÷7+5÷21)÷21分之1÷0.28等于多少?
在下面的算式中填上若干个( ),使等式成立:1÷2÷3÷4÷5÷6÷7÷8÷9.
-13÷2*3÷(-1/3)÷(-5)×(-1^8)=?、、
1÷(2÷3)÷(3÷4)÷(4÷5)怎么做
-5-【(-2)^3+(1-0.8*3/4)÷(-2)] (-5)^2÷(-125)*5/6÷(-0.5)
8÷(2÷3)÷(3÷4)÷(4÷5)÷(5÷6)这道题怎么做?
1÷(2÷3)÷(3÷4)÷(4÷5)÷(5÷6)······(2003÷2004)=?
1÷(2÷3)÷(3÷4)÷(4÷5)÷.÷(2012÷2013)÷(2013÷2014)
有理数除法(-3又2/3)÷(5又1/2) 0÷(-1000) 375÷(-2/3)÷(-3/2)
(1-25%)÷(1+1/3) (80%-2/5÷2)×75% 7.2÷(1(1-25%)÷(1+1/3) (80%-2/5÷2)×75% 7.2÷(1-10%-18%)
2÷(1×3)+2÷(3×5)+2÷(5×7)+2÷(7×9)=
-6÷(-0.25)÷11分之14(-2又2分之1)÷(-10)÷(-3分之1)÷(-5)一步步算