将下列各式化成最简分数,
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将下列各式化成最简分数,
![](http://img.wesiedu.com/upload/3/49/3498bdb443786d68305ddbf4dabd65ba.jpg)
![](http://img.wesiedu.com/upload/3/49/3498bdb443786d68305ddbf4dabd65ba.jpg)
![将下列各式化成最简分数,](/uploads/image/z/19575708-60-8.jpg?t=%E5%B0%86%E4%B8%8B%E5%88%97%E5%90%84%E5%BC%8F%E5%8C%96%E6%88%90%E6%9C%80%E7%AE%80%E5%88%86%E6%95%B0%2C)
1、原式=3 - 1/[2- 1/(10/11)]
=3- 1/[2- (11/10)]
=3 - 1/(9/10)
=3- 10/9
=17/9
=1又8/9
2、原式=1+ 1/{2+ 1/[3+ 1/(21/5)]}
=1+ 1/{2+ 1/[3+ (5/21)]}
=1+ 1/[2+ 1/(68/21)]
=1+ 1/[2+ (21/68)]
=1+ 1/(157/68)
=1+ 68/157
=1又68/157
再问: 3 - 1/[2- 1/(10/11)]这个2是怎么算的?
再答: 通分!2- 1/(10/11)=2 - 11/10=20/10 - 11/10=9/10
再问:![](http://img.wesiedu.com/upload/a/76/a765719004dc6e9f04eece3665ef4c06.jpg)
再答: 对
=3- 1/[2- (11/10)]
=3 - 1/(9/10)
=3- 10/9
=17/9
=1又8/9
2、原式=1+ 1/{2+ 1/[3+ 1/(21/5)]}
=1+ 1/{2+ 1/[3+ (5/21)]}
=1+ 1/[2+ 1/(68/21)]
=1+ 1/[2+ (21/68)]
=1+ 1/(157/68)
=1+ 68/157
=1又68/157
再问: 3 - 1/[2- 1/(10/11)]这个2是怎么算的?
再答: 通分!2- 1/(10/11)=2 - 11/10=20/10 - 11/10=9/10
再问:
![](http://img.wesiedu.com/upload/a/76/a765719004dc6e9f04eece3665ef4c06.jpg)
再答: 对