Question

Transformaţi şi calculaţi :
$a) \: \frac{3}{4} + \frac{5}{9} =$
$b) \: \frac{8}{2} + \frac{4}{7} =$
$c) \: \frac{2}{8} + \frac{6}{3} =$

Answer 1

a) 3/4+5/9=
    =27/36+20/36=47/36
b) 8/2+4/7=
    =56/14+8/14=
    =63/14=9/2
c) 2/8+6/3=
    =1/4+6/3=
    =3/12+24/12=
    =27/12=9/4