[tex]1 \frac{2}{3} - 1.1 \times \frac{9}{11} = \frac{5}{3} - \frac{11}{10} \times \frac{9}{11} = \frac{5}{3} - \frac{9}{10} = \frac{50}{30} - \frac{27}{30} = \frac{23}{30} [/tex]
Liczba odwrotna
[tex] \frac{30}{23} [/tex]
Odpowiedź:
[tex]1\frac{2}{3}-1,1\cdot\frac{9}{11}=1\frac{2}{3}-\frac{\not11^1}{10}\cdot\frac{9}{\not11_{1}}=1\frac{2}{3}-\frac{9}{10}=1\frac{20}{30}-\frac{27}{30}=\frac{50}{30}-\frac{27}{30}=\frac{23}{30}\\\\\\Liczba\ \ odwrotna\ \ do\ \ liczby\ \ a\ \ to\ \ \frac{1}{a}\\\\\dfrac{1}{\frac{23}{30}}=1:\frac{23}{30}=1\cdot\frac{30}{23}=\frac{30}{23}\\\\\\Liczba\ \ odwrotna\ \ do\ \ liczby\ \ \frac{23}{30}\ \ to\ \ \frac{30}{23}[/tex]
