Question

Calcule as expressões:

 

a) 2/4 + (-2/7) : (5/14)

b) 3 . (-2/7) + ( -9/11) : ( -3)

c) [ 2 - (-5/2) : (11/4) . (-11/4)

d) 1 + (-2/3) . (-6/5)

Answer 1

a) 2/4+(-2/7):5/14
    2/4+(-1/7):(5/7)      
    2/4+(-1/7).(7/5)
    2/4+(-1/5)
    2/4-1/5
    2/20

b) 3.(-2/7)+(-9/11):(-3)
    3.(-2/7)+3//11x .(-1)
   3.(-2/7)+3/11
-6/7)+3/11 =22/7

c) [2 -(-5/2):(11/4).(-11/4)]
     2-(-5/2):1
     5

D) 1+(-2/3).(-6/5)
     1+(4/5)
      1