1又1/3-7/12+9/20-11/30+13/42-15/56+17/72-19/90 用简便方法算不要太复杂,也别用方程还有一道:20-5/2-9/4-17/8-33/16-65/32-129/64
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1又1/3-7/12+9/20-11/30+13/42-15/56+17/72-19/90 用简便方法算不要太复杂,也别用方程还有一道:20-5/2-9/4-17/8-33/16-65/32-129/64
1又1/3-7/12+9/20-11/30+13/42-15/56+17/72-19/90 用简便方法算
不要太复杂,也别用方程
还有一道:20-5/2-9/4-17/8-33/16-65/32-129/64
1又1/3-7/12+9/20-11/30+13/42-15/56+17/72-19/90 用简便方法算不要太复杂,也别用方程还有一道:20-5/2-9/4-17/8-33/16-65/32-129/64
1又1/3-7/12+9/20-11/30+13/42-15/56+17/72-19/90
转化为 1+1/3-(3+4)/3*4 +(4+5)/4*5 -(5+6)/5*6 +(6+7)/6*7 -(7+8)/7*8 +(8+9)/8*9 -(9+10)/9*10
转化为1+ 1/3 -1/3 +1/4 -1/4+1/5-1/5+1/6-1/6+1/7-1/7+1/8-1/8+1/9-1/9+1/10
得1又1/10