20道分数口算题(带答案),

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20道分数口算题(带答案),
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20道分数口算题(带答案),
20道分数口算题(带答案),

20道分数口算题(带答案),
(1)5\6*5=6 (2)5\4*2=5/8 (3)2\1*4=2 (4) 4\5*2=2/5 (5)3\1*5=3/5
(6)7\2*6=7/12 (7)5\2*6=5/12 (8)3\5*2=3/10 (9)5\7*2=5/14 (10)5\6*1=5/6
(11)7\9*2=7/18 (12)5\4*2=5/8 (13)2\45*0=0 (14)5\6-5\4=5\2 (15)2\1+2\1=1
(16)4\5-4\5=0 (18)3\2-3\1=3\1 (19)5+4\1=5 (20)4\1 5\1+5\1=5\2