Question

分数巧算：1×4/3＋4×7/3＋7×10/3＋10×13/3＋13×16/3＋16×19/3＋19×22/3

“/”是分数线的意思。“/”前面是分母，“/”后面是分子。

Answer 1

=(1*1+1/3)+(1*2+1/3)+(1*3+1/3)+(1*4+1/3)+(1*5+1/3)+(1*6+1/3)+(1*7+1/3)
=1+2+3+4+5+6+7+3/7
=28+3/7

Answer 2

1×4/3＋4×7/3＋7×10/3＋10×13/3＋13×16/3＋16×19/3＋19×22/3
=(1+1/3)+(9++1/3)+(23+1/3)+(43+1/3)+(69+1/3)+(101+1/3)+(139+1/3)
=387+1/3