Question

7.calculati VA ROOOG DAU COROANA PLS PLS PLS​

Answer 1

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