2 câu trả lời
`1/2+1/3+1/4+1/5+1/6`
`=30/60+20/60+15/60+12/60+10/60`
`=(30+20+15+12+10)/60`
`=87/60`
`=29/20`
Câu hỏi trong lớp
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`1/2+1/3+1/4+1/5+1/6`
`=30/60+20/60+15/60+12/60+10/60`
`=(30+20+15+12+10)/60`
`=87/60`
`=29/20`