Question

Vă rog !!!! Dau coroana!!!!
$\frac{1}{2} - \frac{1}{4} =$
$\frac{1}{3} - \frac{1}{6} =$
$2 - \frac{1}{12}$
$\frac{1}{2} - \frac{3}{8}$

Answer 1

$\dfrac{1}{2}^{ \cdot2} - \dfrac{1}{4} = \dfrac{2}{4} - \dfrac{1}{4} = \dfrac{1}{4}$




$\dfrac{1}{3} ^{ \cdot2} - \dfrac{1}{6} = \dfrac{2}{6} - \dfrac{1}{6} = \dfrac{1}{6}$




$2 - \dfrac{1}{12} = \dfrac{2}{1} ^{ \times 12} - \dfrac{1}{12} = \dfrac{24}{12} - \dfrac{1}{12} = \dfrac{23}{12}$





$\dfrac{1}{2}^{ \times 4} - \dfrac{3}{8} = \dfrac{4}{8} - \dfrac{3}{8} = \dfrac{1}{8}$

Answer 2

1 )

1 / 2  - 1 / 4 = 

= 2 / 4 - 1 / 4

= 1 / 4 ( am amplificat prima fractie cu 2 )
----------------------------------------------------------

2 )

1 / 3 - 1 / 6 = 

= 2 / 6 - 1 / 6

= 1 / 6 ( am amplificat prima fractie cu  2 )

----------------------------------------------------------------

3 )

2 - 1 / 12 = 

= 24 / 12 - 1 / 12

= 23 / 12 ( am amplificat 2 cu 12 )

-----------------------------------------------------

4 )

1 / 2 - 3 / 8 = 

= 4 / 8 - 3 / 8

= 1 / 8 ( am amplificat prima fractie cu 4 )