1/10+1/40+1/88+1/154+1/238+1/340=
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:2024/08/05 16:14:21
1/10+1/40+1/88+1/154+1/238+1/340=
![1/10+1/40+1/88+1/154+1/238+1/340=](/uploads/image/z/5229889-25-9.jpg?t=1%2F10%2B1%2F40%2B1%2F88%2B1%2F154%2B1%2F238%2B1%2F340%3D)
1/10+1/40+1/88+1/154+1/238+1/340
=1/3×(3/10+3/40+3/88+3/154+3/238+3/340)
=1/3×(1/2-1/5+1/5-1/8+1/8-1/11+1/11-1/14+1/14-1/17+1/17-1/20)
=1/3×(1/2-1/20)
=1/3×9/20
=3/20
=1/3×(3/10+3/40+3/88+3/154+3/238+3/340)
=1/3×(1/2-1/5+1/5-1/8+1/8-1/11+1/11-1/14+1/14-1/17+1/17-1/20)
=1/3×(1/2-1/20)
=1/3×9/20
=3/20
1/10+1/40+1/88+1/154+1/238+1/340=
1-1/10+3-1/40+5-1/88+7-1/154+9-1/238+11-1/340
10/40+(1/40+1/80)(x-10)=1
(90+88/1)×89/1=?
(90+1/88)*1/89=?
1*1=1 40/6
1/55+1/66+1/77+1/88+1/99
10分之一加40分之一加88分之一加154分之一加238分之一加340分之一加460分之一等于多少?
5\1-10\1-20\1-40\1-80\1-160\1-360\1
1-1/10-1/100-1/1000-.-1/1000000=
10/40+(x—10)*(1/40+1/80)=1
1+1+1-1=?.