Răspuns:
Explicație pas cu pas:
5)
=³⁾9/4-16/12
=27/12-16/12
= 11/12 ( C)
-
6)
= 5/12 *9/25 + 6/5 *( ³⁾4/6-8/18)
=5/12*9/25+6/5*( 12/18-8/18 )
= 5/12*9/25+6/5*4/18
= se simplifica 25 cu 5 ....9 cu 12 ......18 cu 6
= ³⁾3/20+⁴⁾4/15
= 9/60+16/60
= 25⁽⁵/60
= 5/12 (b)
