Question

ex.9Dintr un vas plin cu ulei cu capacitate de 25
$\frac{3}{4}$
liri, sau scos 18
$\frac{5}{6}$
L de ulei.Ce cantitate de ulei a rămasîn vas?
ex.10calculați
$( \frac{1}{7} + \frac{7}{11} + \frac{2010}{2011} ) + ( \frac{6}{7} + \frac{4}{11} - \frac{2010}{2011} =$

Answer 1

9)

$\it 25\dfrac{3}{4} = \dfrac{103}{4};\ \ \ \ 18\dfrac{5}{6}=\dfrac{113}{6}\\ \\ \\ \dfrac{103}{4}-\dfrac{113}{6}=\dfrac{83}{12}=6\dfrac{11}{12}\ \ell\ de\ ulei\ au\ r\breve{a}mas$

10)

$\it = (\dfrac{1}{7}+\dfrac{6}{7})+(\dfrac{7}{11}+\dfrac{4}{11})+(\dfrac{2010}{2011}-\dfrac{2010}{2011})=1+1+0=2$

Answer 2

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