Question

1 supra 2+ 2 supra 3 : 4 supra 9

Answer 1

 

$\displaystyle\\\frac{1}{2}+ \frac{2}{3}:\frac{4}{9}=~~~~~~~\text{(Facem mai intai impartirea.)}\\\\=\frac{1}{2}+ \frac{2}{3}\times\frac{9}{4}=\\\\=\frac{1}{2}+ \frac{3}{2}=\\\\=\frac{1+3}{2}=\frac{4}{2}=\boxed{\bf2}$

Answer 2

$\frac{1}{2} + \frac{2}{3} \div \frac{4}{9} =$
$\frac{1}{2} + \frac{2}{3} \times \frac{9}{4} =$
$\frac{1}{2} + \frac{1}{1} \times \frac{3}{2} =$
$\frac{1}{2} + \frac{3}{2} =$
$\frac{4}{2} = \frac{2}{1} = 2$