263-265= -2
1/3-1/5=5/15-3/15=2/15
4/7-3/10=40/70-21/70=19/70
8/15-1/2=16/30-15/30=1/30
3/5-1/7=21/35-5/35=16/35
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263-265= -2
1/3-1/5=5/15-3/15=2/15
4/7-3/10=40/70-21/70=19/70
8/15-1/2=16/30-15/30=1/30
3/5-1/7=21/35-5/35=16/35
2)4/7 - 3/10 = 40/70 - 21/70 = 19/70
3)8/15 - 1/2 = 16/30 - 15/30 = 1/30
4)3/5 - 1/7 = 21/35 - 5/35 = 16/35
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