Question

a) 1/2+1/4×(-7/2)-5/4-(-1/8)

b) (9/4+7/2)+[3^16×(-10)-7^2]

c) (0,5) × (-1,4+2,1)

Answer 1

a) 1/2+1/4×(-7/2)-5/4-(-1/8)
1/2 -7/8 - 5/4 + 1/8
MMC de 2 e 4 e 8 = 8
4/8 -7/8 - 10/8 + 1/8
-12/8 (simplificar por 4)
-3/2

b) (9/4+7/2)+[3^16×(-10)-7^2]
(9/4+14/4)+[43046721 × (-10) -49]
23/4 - 43046770
5,75 - 43046770
43046764,25
?

c) (0,5) × (-1,4+2,1)
0,5 × 0,7
0,35