2÷(1×3)+2÷(3×5)+2÷(5×7)+2÷(7×9)=
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/06/16 13:11:56
2÷(1×3)+2÷(3×5)+2÷(5×7)+2÷(7×9)=
![2÷(1×3)+2÷(3×5)+2÷(5×7)+2÷(7×9)=](/uploads/image/z/6005018-2-8.jpg?t=2%C3%B7%EF%BC%881%C3%973%EF%BC%89%2B2%C3%B7%EF%BC%883%C3%975%EF%BC%89%2B2%C3%B7%EF%BC%885%C3%977%EF%BC%89%2B2%C3%B7%EF%BC%887%C3%979%EF%BC%89%3D)
=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
再问: 不太懂~~
=1-1/15
=14/15
再问: 不太懂~~
2÷(1×3)+2÷(3×5)+2÷(5×7)+2÷(7×9)=
(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.
请问1÷(2÷3)÷(3÷4)÷(4÷5)÷...÷(2008÷2009)÷(2009÷2010)怎么做?
(2/3-5/9×3/8)÷7/16
-42×[(1-7)÷6]+[(-5)3-3]÷(-2)3
解方程:(2x-7)÷3=(3-2x)÷5
(4/3-5/3)÷10/7 (3/2+9/2)÷21/20 1-14/5÷7/5
15/16÷(5/12÷5/8+3/8) 6/7-6/7×(2/3+1/9) 【1-(1-2/3÷
2-(5/1+3/1),(4/3-5/3)÷10/7,(3/2+9/2)÷21/20,1-14/5÷7/5,4/1÷(3
3x÷2=(x+7)÷3
(2÷3÷7+4÷6÷14+14÷21÷49)÷(4÷7÷9+8÷14÷18+28÷49÷63)