Question

Calcule o valor das expressões:

A) 3/4 + ( - 1/2 ) + ( - 2/5 )

B) 2 + 3 + ( - 4/3 )

Answer 1

a) 3/4 +(-1/2) + (-2/5)
3/4 - 1/2 -2/5
5x3/20 -10x1/20 -4x2/20
15/20 -10/20 -8/20
15 -10 -8
-3

b)2+3+(-4/3)
2+3-4/3
3x2/3+3x3/3-4/3
6/3+9/3-4/3
6+9-4
11

Answer 2

(A) vai dar 0.4 é a (B) vai dar 17