Question

2) Calcule o resultado de : a) (-4/5) + (-1/2)= b)(-5/3)-(-3/4)= 3) O valor da expressão (3/4 + 7/4) -25/8 é: a)-15/8 b)-5/4 c)-15/16 d) -5/8​

Answer 1

Resposta:

2.

a) (-4/5) + (-1/2) = -8/10 - 5/10 = -13/10

b) (-5/3) + (3/4) = -20/12 + 9/12 = -11/12

3.

(3/4 + 7/4) - 25/8 = 10/4 - 25/8 = 20/8 - 25/8 = -5/8 (D)