Question

[(1/3 - 1/4) dividido 7/12 + 1/7 x ( 7/2 - 5/2)] x 1/2 dividido por 1/7

Answer 1

Vamos lá:

mmc é 12 ficando

 1/3 - 1/4 = 4-3/12= 1/12
1/12 : (7/12+ 1/7) x ( 7/2 -5/2) x 1/2/1/7
1/12: (61/84) x (3/2) x 1/2 x 7/1 = 1/12 x 84/61 x 7/2 = 84/732 x 7/2 = 588/64 = 294/32 = 147/16
 Sabedoria e Entendimento

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