Răspuns:
a) 17/6-100/9:25/6=
17/6- 100/9×6/25=
17/6- 8/3= (a 2a fractie o amplifici cu 2)
17/6-16/6=1/6
b) 27/25:54/49+36/35:20/7=
27/25×49/54+36/35× 7/20=
1/25×49/2+9/5×1/5=
49/50+9/25= (a 2a fractie o amplifici cu 2)
49/50+18/50=67/50
c) 49/60:7/4-15/16×8/25=
49/60×4/7-3/2×1/5=
7/15×1/1-3/10=
7/15-3/10= (prima fractie o amplifici 2 si a 2a cu 3)
14/30-9/30=5/30=1/6 (simplificat)
