Question

relsova as frações
2/5 + 3 / 5 + 1 / 5 - 4 / 5 + 6 / 5 =




2/5+1/3 =



4/5 + 3/8=​

Answer 1

Resposta:

Explicação passo-a-passo:

2/5 + 3 / 5 + 1 / 5 - 4 / 5 + 6 / 5 =

= 6/5 - 4/5 + 6/5

= 12/5 - 4/5

= 8/5

R.: 8/5

-------------

2/5+1/3 =

= (3.2 + 5.1)/15

= (6+5)/15

= 11/15

R.: 11/15

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Mmc(5,3)= 15

5,3: 3

5,1: 5

1,2

= 3.5

= 15

----------------

c)

4/5 + 3/8=​

= (8.4 + 5.3)/40

= (32+15)/40

= 47/40

R.: 47/40

-------------------

Mmc (5,8): 40

5,8: 2

5,4: 2

5,2: 2

5,1: 5

1,1

= 2.2.2.5

= 8.5

= 40