1/2+1/6+1/12+1/20+1/30=简便计算
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![1/2+1/6+1/12+1/20+1/30=简便计算](/uploads/image/z/471514-58-4.jpg?t=1%2F2%2B1%2F6%2B1%2F12%2B1%2F20%2B1%2F30%3D%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97)
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1/2+1/6+1/12+1/20+1/30=简便计算
1/2+1/6+1/12+1/20+1/30=简便计算
1/2+1/6+1/12+1/20+1/30=简便计算
1/2+1/6+1/12+1/20+1/30
=(1/2+1/6+1/12+1/20+1/30)×60÷60
=(30+10+5+3+2)÷60
=50÷60
=5/6