Question

sabe-se que A =(84 - 5 x6) ÷ (7 + 2 x 10) x (40-30-2) e B=(8 x 3÷ 12) +(9÷3+6).Calcule A - B

Answer 1

A= (84-30) : (7+20) x 8
A= 54 : 27 x 8
A= 2x8
A= 16
B= (24:12) + (3+6)
B=  2+9
B=11
(A) - (B) = 16 - 11= 5

Answer 2

A= (84 - 5 x 6):(7 + 2 x 10)x(40-30-2)
          (84-30) : (7+20)  x 8
               54 : 27 x 8
                 2 x 8 = 16

B=(8 x 3:12) + (9:3+6)
        (8 x 4) + (3+6)
              32 + 9 = 41

Então, A - B= 16 - 41= - 25