Question

) Efetue as multiplicações
a) (+8) . (+5) =                                       b) (-8) . ( -5) =
c) (+8) .(-5) =                                      d) (-8) . (+5)=
e) (-3) . (+9) =                                        f) (+3) . (-9) = 
g) (-3) . (-9) =                   h) (+3) . (+9)=
i) (+7) . (-10) =                                       j) (+7) . (+10) = 

2) Calcule o produto
a) (+2) . (-7) =                                       b) 13 . 20 =
c) 13 . (-2) =                                          d) 6 . (-1) =
e) 8 . (+1) =                                            f) 7 . (-6) =​

Answer 1

Resposta:

1) a) 40    b) 40    c) -40    d) -40    e) -27    f) -27    g) 27    h) 27    i) -70     j) 70

2) a) -14    b) 260    c) -26     d) -6     e) 8    f) -42