...4|1(四分之一)+ 28|1 + 70|1 + 130|1 + 208|1 + 304|1
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1/4+1/28+1/70+1/130+1/208|+1/304
=2/7+1/70+1/130+1/208|+1/304
=3/10+1/130+1/208+1/304
=4/13+1/13*16+1/304
=5/16+1/16*19
=96/16*19
=6/19
不明白的再问哟,请及时采纳,多谢!
