影子和猪
幼苗
共回答了29个问题采纳率:89.7% 举报
1/12+1/24+1/36+1/48+1/60+1/72
=(1-3-1/4)+(1/4-1/6)*1/2+1/36+(1/6-1/8)*1/2+1/60+(1/8-1/9)
=(1/3-1/4+1/8-1/9)+【(1/4-1/6+1/6-1/8)*1/2】+1/36+1/60
=7/72+1/16+1/36+1/60
=(7/72+1/36)+1/16+1/60
=1/8+1/16+1/60
=3/16+1/60
=49/240
1年前
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