Resposta:

A = 0,622   ou  28/45

B = 7,56

Explicação passo a passo:

fazendo as contas

Verified answer

a) 28/45

b) 189/25

a) 4/5-(1/3)²+(-15)-¹ = mmc 5,9,15 = 45

4/5-1/9-1/15

36/45-5/45-3/45

28/45

b) 10-(1,2)²+(-1)³ = mmc = 25

10-(6/5)²-1

10-36/25-1

10-1-36/25

9-36/25

189/25

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17/04/22