Question

2) Efetue as multiplicações COM OS CÁLCULOS POR FAVOR

a) (+8) • (+5) =

b) (-3) • (+9) =

c) (+7) • (-10) =

d) 13 • 20 =

e) (-3) • (+2) • (-4) • (+1) • (-5)
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Answer 1

Resposta:

OLÁ VAMOS A SUA PERGUNTA:⇒⇒

■》》

A:)

$(+8) \times (+5)$

$8 \times 5 = \red{40}$

$\boxed{\bold{\displaystyle{\clubsuit\ \spadesuit\ \maltese =  40 }}}\ \checkmark$

B:)

$(-3) \times (+9)$

$- 3 \times 9 \red{= - 27}$

$\boxed{\bold{\displaystyle{\clubsuit\ \spadesuit\ \maltese  = - 27 }}}\ \checkmark$

C:)

$(+7) \times (-10)$

$7 \times - 10 \red{ = - 70}$

$\boxed{\bold{\displaystyle{\clubsuit\ \spadesuit\ \maltese  = - 70 }}}\ \checkmark$

D:)

$13 \times 20$

$13 \times 20 \red{ = 260}$

$\boxed{\bold{\displaystyle{\clubsuit\ \spadesuit\ \maltese  = 260}}}\ \checkmark$

E:)

$(-3) \times (+2) \times (-4) \times (+1) \times (-5)$

$-6\left(-4\right)\left(-5\right)=-120$

$24\times 1\left(-5\right)=-120$

$24\left(-5\right)=-120$

$\boxed{\bold{\displaystyle{\clubsuit\ \spadesuit\ \maltese  = - 120 }}}\ \checkmark$

Explicação passo-a-passo:

ESPERO TER AJUDADO

Answer 2

Oie, Td Bom?!

a)

= (+ 8) . (+ 5)

= + 40

b)

= (- 3) . (+ 9)

= - 27

c)

= (+ 7) . (- 10)

= - 70

d)

= 13 . 20

= 260

e)

= (- 3) . (+ 2) . (- 4) . (+ 1) . (- 5)

= (- 3) . (+ 2) . (- 4) . (- 5)

= - (3 . 2 . 4 . 5)

= - (3 . 10 . 4)

= - (30 . 4)

= - 120

Att. Makaveli1996