Resolva a expressão numérica: 3/2-6/5+1/2-1/6+5/6 =
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3/2-6/5+1/2-1/6+5/6
3/2-6/5+1/2+4/6
3/2+1/2 -6/5+2/3
4/2-6/5+2/3
2-6/5+2/3
(10-6)/5+2/3
=4/5+2/3 =(12+10)/15=22/15
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