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小五數學 分數
Oct 10th 2013, 00:34

1.用擴分找出8/15所有分母小於100的等值分數?
Sol
8/15=2*8/(2*15)=3*8/(3*15)=4*8/(4*15)=5*8/(5*15)=6*8/(6*15)
8/15=16/30=24/45=32/60=40/75=48/90

2.找出2個在指定數之間的分數
(1)在4/6和5/6之間的分數有
Sol
4.1/6=41/60
4.3/6=43/60

(2)在1和1又1/8之間的分數有
Sol
8/8，9/8
8.1/8=81/80
8.3/8=83/80


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