Question

resolver as expressões e simplificar o resultado: 
A) (-4/5) . (35/16)+5/4 B) (4-1/3) : (4+1/2) C) (2/5-1/4) . (1/3-1) : (-2-4/5) D) (-3-1/3) : [(-6/5) : (22/25)]+1/5

Answer 1

a= -4/5. 35//16 + 5/4
-140/80 +5/4 simplifica o -140/80 por 2 ficando:
-70/40 + 5/4 mmc de 40,4 = 40

-70+50 / 40 =  -20/40 simplificando por 2  fica:  -10/ 20 por 2 de novo: -5/10

B=4-1/3  = 12-1 / 3 = 11/3
4+1/2 = 8+1/2 = 9/2

11/3:9/2 == 11/3 . 2/9 = 22/ 27

C= 2/5 -1/4 . 1/3 - 1 : (-2- 4/5)
2/5 - 1/ 12 -1 : ( -14/5)
2/5 - 1/12 -1. (-5/14)
2/5 - 1/12 +5/14 mmc de 5, 12 , 14 = 420
168- 35 + 150 / 420 =  283 / 420

D= -9-1/3 : [ -6/5. 25/22] + 1/5
-10 / 3 .[ -11/15] + 1/5
110 / 45 + 1/5 
22/9 + 1/5 mmc de 9,5 = 45
110+9/45 =  119/45