calcule as adicoes entre fracoes com denominadores diferentes simplificando o resultado sempre que possível ; relacionando a 2 coluna de acordo com a 1​ . a)2/3+3/15 ' b) 8/12+3/5' c) 3/4-1/3 ' d) 7/16+4/2' e) 3/5+4/2'f)8/10+ 3/4' g) 4/18+8/12' h)8/10-4/9. ( )39/16 ( )5/12( )8/9 ( )16/45 ( )19/15 ( ) 31/20 ( )13/15 ( ) 41/35
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