Question

1) Faça as multiplicações:
a) (+3).(+2)
b) (+8).(3)=
c) (+7).(1)
d) (+8).(-4)=
e) (+1).(-9)=
f) (-8). (+1)
g) (+10).(+9)=
h) (+1).(+15) =
i)(-4). (+12)=​

Answer 1

Explicação passo-a-passo:

1) Faça as multiplicações:

a) (+3).(+2) = +6

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

c) (+7).(1) = 7

d) (+8).(-4)= -32

e) (+1).(-9)= -9

f) (-8). (+1) = -8

g) (+10).(+9)= 90

h) (+1).(+15) = 15

i)(-4). (+12)= -36

Answer 2

Resposta:

> regra de sinais:

( + ) com ( + ) = ( + )

( - ) com ( - ) = ( + )

( + ) com ( - ) = ( - )

( - ) com ( + ) = ( - )

______________

a) ( + 3 ) . ( + 2 )

= 3 . 2

= +6

b) ( + 8 ) . ( + 3 )

= 8 . 3

= +24

c) ( + 7 ) . ( + 1 )

= 7 . 1

= +7

d) ( + 8 ) . ( - 4 )

= - 8 . 4

= - 32

e) ( + 1 ) . ( + 9 )

= - 1 . 9

= - 9

f) ( - 8 ) . ( + 1 )

= - 8 . 1

= - 8

g) ( + 10 ) . ( + 9 )

= 10 . 9

= +90

h) ( + 1 ) . ( + 15 )

= 1 . 15

= + 15

i) ( - 4 ) . ( + 12 )

= - 4 . 12

= - 48