Efetue as múltiplicações:
a)(-4) × (-5) × (+2)=
b)(-7) × (+2) × (-1)=
c)(+9) × (-2) × (+5)=
d)(-5) × (+3) × (-2)=
e)(-10) × (+2) × (+3)=
f)(-1) × (-4) × (+3) × (-2)=
g)(-5) × (-3) × (-8) × (+3)=
h)(+10) × (-2) × (+1) × (-3) × (+2)=
i)(-3) × (+2) × (-1) × (+4) × (-10)=
j)(-1) × (+1) × ) × (-1)=
k)(-2) × (-2) × (-2) × (-2) × (-2)=
l)(-1) × (-1) × (-1) × (-1) × (-1) × (-1)=
Pfvr me ajudem
Soluções para a tarefa
Resposta:
Explicação passo a passo:
a)
(- 4) × (- 5) × (+ 2) =
20 × (+2) = 40
b)
(- 7) × (+ 2) × (- 1) =
- 14 × (- 1) = 14
c)
(+ 9) × (- 2) × (+ 5) =
- 18 × (+ 5) = - 90
d)
(- 5) × (+ 3) × (- 2) =
- 15 × ( - 2) = + 30 ou 30 (são iguais)
e)
(- 10) × (+ 2) × (+ 3) =
- 20 × (+ 3) = - 60
f)
(- 1) × (- 4) × (+ 3) × (- 2) =
+ 4 × (+ 3) × (- 2) =
+ 12 × (- 2) = - 24
g)
(- 5) × (- 3) × (- 8) × (+ 3) =
+ 15 × (- 8) × (+ 3) =
- 120 × (+ 3) = - 360
h)
(+ 10) × (- 2) × (+ 1) × (- 3) × (+ 2) =
- 20 × (+ 1) × (- 3) × (+ 2) =
- 20 × (- 3) × (+ 2) =
+ 60 × (+ 2) = 120
i)
(- 3) × (+ 2) × (- 1) × (+ 4) × (- 10) =
- 6 × (- 1) × (+ 4) × (- 10) =
+ 6 × (+ 4) × (- 10) =
+ 24 × (- 10) = - 240
j)
(- 1) × (+ 1) × (- 1) =
- 1 × (- 1) = + 1
k)
(- 2) × (- 2) × (- 2) × (- 2) × (- 2) = - 32
l)
(- 1) × (- 1) × (- 1) × (- 1) × (- 1) × (- 1) = + 1