2)Determine o valor de cada expressão a) 1/2+ 1/3 + 5/6

"2,3,6:2'

"1,3,3:3"

"1,1,1"

=2.3

="6"

'mmc=6'

'(3+2+5)/6'

= '10/6'(:2)/(:2)

= '5/3'

______________

(B)3/4+1/2+2/3+1/6

'3,4,2,3:2'

''3,2,1,3':2'

"3,1,1,3:3"

"1,1,1,1"

=2.2.3

= "12"

MmC="12"

='(3.3+6+4.2+2)/12'

='(9+6+8+2)/12'

='25/12'