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(1/4-1/6):8/15
2/7+4/5x3/2


Răspuns :

1/4 aplificat cu 3=3/12
1/6 amplificat cu 2 = 2/12
(3/12-2/12)8/15=
= 1/12 : 8/15=
=1/12*15/8=
=1/4*5/8=5/32


2/7+4/5*3/2=
=2/7+12/10=
2/7+ 1 intreg 2/10=
20/70+1intr 14/70=1intr 34/70=17/35