Question

1\(\dfrac{4}{23}\) +\(\dfrac{5}{21}\) -  \(\dfrac{4}{23}\) +  0,5  +\(\dfrac{16}{21}\)

Answer 1

=1+4/23-4/23+5/21+16/21+1/2

=1+1+1/2

=5/2

Answer 2

\(\dfrac{27}{23}\) + \(\dfrac{5}{21}\) - \(\dfrac{4}{23}\) + \(0,5\) + \(\dfrac{16}{21}\)

= [ \(\dfrac{27}{23}\) - \(\dfrac{4}{23}\) ] + [ \(\dfrac{5}{21}\) + \(\dfrac{16}{21}\) ] + 0,5

=  1 + 1 + 0,5 

=  2 + 0,5

=  2,5