Question

calcule o valor das expressões: a) 3/5 - 1 - 2/5 b) 4 - 1/10 +2/5 c) 1/2 - (-3/5) + 7/10 d) -2 -(-1/8) - 1/8 e) 5/12 + (-1/4) - (+1/6)

Answer 1

A) (3/5) - 1 - (2/5) = 3 - 5 - 2 = -4 B) 4 - (1/10) + (2/5)= 40 - 1 + 4= 43 C) (1/2) - (-3/5) + (7/10)= 5 - (-6) + 7 = 5 + 6 + 7= 18 D) (-2) - (-1/8) - (1/8)= -16 - (-1) - 1 -16 + 1 - 1 -16 E) (5/12) + (-1/4) - (1/6) = 5 + (-3) - 2 = 0

Answer 2

a=-0,8 b=4,3 c=0,4 d=-2 e=0