Question

Calcule o valor das expressoes!
A) (2/3)² - ( 6/5)¹ x (1/2)³
B)3/10 + 1/2 / 1 - 0,2
C) (4²)³ x (3 x 7 - 5)-²

Answer 1

Resposta:

A) 53/180 = 0.294

B) 3/5 = 0.6

C) 16

Explicação passo-a-passo:

A) (2/3)² - ( 6/5)¹ x (1/2)³ =

4/9 - 6/5 x 1/8 =

4/9 - 6/40 =

4/9 - 3/20 =

(20x4-3x9)/20x9 =

(80-27)/180 =

53/180 = 0.294

B) 3/10 + 1/2 / 1 - 0,2 =

3/10 + 1/2 - 1/5 =

3/10 + (1x5)/(2x5) - (1x2)/(5x2) =

3/10 + 5/10 - 2/10 =

(3+5-2)/10 =

6/10 =

3/5 = 0.6

C)  (4²)³ x (3 x 7 - 5)-² =

4^6 x (16)^-2 =

4^6 x (4^2)^-2 =

4^6 x 4^-4=

4^[6+(-4)] =

4^2 = 16