(5/7-1/2)x28/9-21/10x(3/7-1/9)
(5/7-1/2)x28/9-21/10x(3/7-1/9)
4
punti
Livello 0
(5/7-1/2)x28/9-21/10x(3/7-1/9)
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$\small \left(\dfrac{5}{7}-\dfrac{1}{2}\right)·\dfrac{28}{9}-\dfrac{21}{10}·\left(\dfrac{3}{7}-\dfrac{1}{9}\right)=$
$\small =\left(\dfrac{10-7}{14}\right)·\dfrac{28}{9}-\dfrac{21}{10}·\left(\dfrac{27-7}{63}\right)=$
$\small =\dfrac{\cancel3^1}{\cancel{14}_1}·\dfrac{\cancel{28}^2}{\cancel9_3}-\dfrac{\cancel{21}^1}{\cancel{10}_1}·\dfrac{\cancel{20}^2}{\cancel{63}_3}=$
$\small =\dfrac{1}{1}·\dfrac{2}{3}-\dfrac{1}{1}·\dfrac{2}{3}=$
$\small =\dfrac{2}{3}-\dfrac{2}{3}=$
$\small =\dfrac{0}{3}= 0$
58332
punti
Genius I