4/1+28/1+70/1+130/1+208/1=?简算

问题描述:

4/1+28/1+70/1+130/1+208/1=?简算

4/1+28/1+70/1+130/1+208/1
=4+28+70+130+208
=(4+28+208)+(70+130)
=240+200
=440分数是不是你的分子分母都写反了啊??1/4+1/28+1/70+1/130+1/208=?简算,我可以采纳你如果是这样就应该是1/4+1/28+1/70+1/130+1/208=1/4+(1/4-1/7)×1/3+(1/7-1/10)×1/3+(1/10-1/13)×1/3+(1/13-1/16)×1/3=1/4+1/4×1/3-1/7×1/3+1/7×1/3-1/10×1/3+1/10-1/13×1/3+1/13×1/3-1/16×1/3=1-1/48=47/48