Question

Resolva as Adições e Subtrações a Seguir:

a)
$\frac{1}{3} + \frac{5}{2} =$
b)
$\frac{4}{7} - \frac{8}{10} =$
c)
$\frac{2}{5} + \frac{3}{6} =$
d)
$\frac{6}{7} - \frac{9}{7} =$
e)
$\frac{3}{10} + \frac{4}{2} =$
f)
$\frac{4}{9} - \frac{8}{6} =$
Obs: Sem brincadeiras!!
​

Answer 1

Resposta:

Explicação passo-a-passo:

A)

= 1/3+5/2

= (2+3.5)/6

=(2+15)/6

= 17/6

________

B)

= 4/7 - 8/10 (:2)/(:2)

= 4/7 - 4/5

= (5.4 - 7.4)/35

=(20-28)/35

= - 8/35

___________

C)

= 2/5+3/6 (:3)/(:3)

= 2/5 + 1/2

= (2.2+5.1)/10

=(4+5)/10

= 9/10

---------

D)

= 6/7 - 9/7

= - 3/7

_________

E)

= 3/10 + 4/2

= 3/10+2

= (1.3+20)/10

= (3+20/10

= 23/10

________

F)

= 4/9 - 8/6(:2)/(:2)

= 4/9 - 4/3

= (1.4 - 3.4)/9

=(4 - 12)/9

= - 8/9