Răspuns:
a) 3330/57 b) 1148/1400 c) 3 b) 1/2
Explicație pas cu pas:
a) (1/6 + 109/30)30/19=
(5/30+109/30)×30/19=
111/30×30/19=3330/57
b)
(19/40 -1/8) × (8/7+6/5)
(19/40-5/40) × (40/35 + 42/35)
14/40 × 82/35=1148/1400
c)3/4 × 4/3 + 4/3 × 3/2=
/12 + 12/6=
1/1 + 2/1 = 3/1 = 3
d)
54 × (1/2 + 3/5 - 7/10)=
5/4 × (5/10 + 6/10 - 7/10) =
5/4 × (11/10 - 7/10) =
5/4 × 4/10 = 20/40 = 1/2
