Question

Efetue as multiplicações: a) ( + 5 ) . ( + 3 )= b) ( + 4 ) . ( – 5 )= c) ( – 8 ) . ( + 4 )= d) ( – 6 ) . ( – 7 )= e) ( – 2 ) . ( + 4 ) . ( + 3 ) . ( – 1 )= f) ( – 5 ) . ( – 6 ) . ( – 2 )= g) 2 . (- 3 ) . ( + 6 )=

Answer 1

a) ( + 5 ) . ( + 3 )= +15

b) ( + 4 ) . ( – 5 )= -20

c) ( – 8 ) . ( + 4 )= -32

d) ( – 6 ) . ( – 7 )= +42

e) ( – 2 ) . ( + 4 ) . ( + 3 ) . ( – 1 )=

( -8 ) . ( -3 )= +24

f) ( – 5 ) . ( – 6 ) . ( – 2 )=

( +30 ) . ( -2 )= -60

g) 2 . (- 3 ) . ( + 6 )=

( -6 ) . ( +6 )= -36