Question

(–2/5) . (−3/2) . (–8/5)

r) (–1/2) . (−1/2) . (–1/2)


s) (– 1) . (+5/3) . (+3/5)

t) (+ 7) . (−1/7) . (+ 7)

Answer 1

Explicação passo a passo:

REGRA> Na multiplicação ou divisão de SINAIS IGUAIS fica SINAL MAIS e de SINAIS DIFERENTES fica SINAL MENOS

q

(–2/5) . (−3/2) . (–8/5)

multiplica os numeradores e os denominadores

( -2/5) * ( - 3/2) = + 6/10

(+ 6/10 ) * ( - 8/5) = - 48/50 >>>>RESPOSTA

r)

(–1/2) . (−1/2) . (–1/2)=

( - 1/2) * (- 1/2) =+ 1/4 >>>

( +1/4) * ( - 1/2) = -1/8 >>>>>>resposta

s)

(– 1) . (+5/3) . (+3/5) =

(- 1/1) * ( + 5/3) = - 5/3 >>>>

( - 5/3) * ( + 3/5 ) = - 15/15 = - 1/1 >>>> resposta

t)

(+ 7) . (−1/7) . (+ 7)

(+7/1 ) * ( - 1/7 ) = - 7/7 ou - 1 >>>

( -1 ) * ( +7 ) =- 7 >>>>resposta