Answers

2016-06-28T20:56:08+08:00
4 1/2- 8/5=n

8/5= 1 3/5
4 1/2- 1 3/5= 4 5/10-1 6/10
4 5/10= 3 15/10
3 15/10-1 6/10= 2 9/10
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