Question

7 – Faça as operações e associe as expressões aos seus resultados na coluna à direita:

( ) 11/30
( ) 41/20
( ) 5/2
( ) 2/3

Answer 1

a) 1/4 - 3/4 - 6/4 - 2/4 =

1-3-6-2/4 = -10/4

-5/2

b) 1/2 . 4/3

2/3

c) 1/2 - 3/10 + 1/6 =

15/30 - 9/30 + 5/30 =

(15-9+5) / 30

11/30

d) 1/5 + 3/4 - 5/2 - 1/2 =

4/20 + 15/20 - 50/20 - 10/20 =

(4+15-50-10) / 20 =

-41/20