Question

3) Resolva as expressões numéricas.

A) (7 x 7 + 5) : (18 - 15 : 3 + 5) x 2 =

B) (30 - 5 x 6) : (7 + 2 x 10) x (40 - 30 + 5) =

C) 2 + 30 : 5 + (9 x 6 - 4) : 5 - (40 : 10 + 3) =

Answer 1

Explicação passo-a-passo:

a)

(7 x 7 + 5) : (18 - 15 : 3 + 5) x 2

= (49 + 5) : (18 - 5 + 5) x 2

= 54 : (13 + 5) x 2

= 54 : 18 x 2

= 3 x 2

= 6

b)

(30 - 5 x 6) : (7 + 2 x 10) x (40 - 30 + 5)

= (30 - 30) : (7 + 20) x (10 + 5)

= 0 : 27 x 15

= 0 x 15

= 0

c)

2 + 30 : 5 + (9 x 6 - 4) : 5 - (40 : 10 + 3)

= 2 + 30 : 5 + (54 - 4) : 5 - (4 + 3)

= 2 + 30 : 5 + 50 : 5 - 7

= 2 + 6 + 10 - 7

= 8 + 10 - 7

= 18 - 7

= 11