如何用简便方法计算3⼀4+3⼀28+3⼀70+3⼀130+3⼀208

如何用简便方法计算3/4+3/28+3/70+3/130+3/208
2025-06-24 03:06:52
推荐回答(1个)
回答1:

3/4+3/28+3/70+3/130+3/208
=(1-1/4)+(1/4-1/7)+(1/7-1/10)+(1/10-1/13)+(1/13-1/16)
=1-1/16
=15/16