Question

calcule as operações com as frações:
a)1/3 + 2/5=
b)1/2 - 3/4=
c)5/7 × 35=
d)1/9 : 2/5=​

Answer 1

Resposta:

Explicação passo a passo:

Calcule as operações com as frações:

a)1/3 + 2/5

Mmc (3,5)= 15

= (5.1+3.2)/15

= (5+6)/15

= 11/15

______________

b)1/2 - 3/4

= (2 - 3)/4

= -1/4

c)5/7 × 3/5= 5/5 . 3/7

= 3/7

Se for :

5/7 . 35 = 35/7 . 5 = 5.5

= 25

d)1/9 : 2/5= 1/9 . 5/2 = 5/18