Question

Por favor me ajudem na consigo resolver

Answer 1

Resposta:

Explicação passo-a-passo:

a) 8/10 + 4/10 - 7/10 = 5/10.

b) 7 1/9 + 3/9 = 64/9 + 3/9 = 67/9 =  7 4/9.

7 1/9 = (9 x 7 + 1)/9 = 64/9.      

  67 ÷ 9 = 7 + 0,444...  = 7 4/9.

c) 15/8 - 1/2 + 1/4 = 15/8 - 4/8 + 2/8 = 13/8.

d) 3 2/5 - 7/5 = 17/5 - 7/5 = 10/5.

e) 3 1/4 - 2 1/3 = 13/4 - 7/3 = 39/12 - 28/12 = 11/12.

f) 3/4 - 2/3 + 1/6 = mmc(3,4,6)=12

9/12 - 8/12 + 2/12 = 3/12 = 1/4.