Question

resolva a expressão numérica -4 +[3².3/5 -(0,5+ 0,3 ÷9/2)]-¹

A) 2/7
B) ½
C) 2
D)7/2
E)4/3

Answer 1

Resposta:

Explicação passo-a-passo:

-4 +[3².3/5 -(0,5+ 0,3 ÷9/2)]-¹ =

- 4 + [ 9. 3/5 - ( 5/10 + 3/10 :9/2 )] -¹ =

-4 + [ 27/5 - ( 5/10 + 3/10 . 2/9)]-¹  =

-4 + [27/5- ( 5/10 + 6/90)] -¹ =

- 4 + [ 27/5 - ( 1/2 + 2/30)]-¹  =

-4 + [ 27/5 - (1/2 + 1/15)]-¹  =

-4 +  [ 27/5 - (15/30 + 2/ 30)]-¹ =

-4 + [ 27/5 - 17/30 ] -¹ =

-4 + [810/150 - 85/150]-¹ =

-4 + [ 725/150]-¹  =

-4 + 150/725=

  -500/ 725 + 150/725=

- 350/725       => (:5)

-70/145           => (:5)

-14/29