Question

Calcule o valor das expressões numéricas:

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Answer 1

Resposta:

Explicação passo-a-passo:

a) (3/4) . (2/5 + 5/5) ÷ (1/3) =  (3/4) . (7/5) ÷ (1/3) =  (21/20) . (3) = 63/20.

b) 3/8 + 5/4 = 3/8 + 10/8 = 13/8.

13/8 - 5/6 = mmc(6,8) =24

39/24 - 20/24 = 19/24

2 - 6/5 = 10/5 - 6/5 = 4/5

(13/8 - 5/6)/(4/5) = (19/24)/(4/5) =  (19/24) . (5/4) = 95/96.