Odpowiedź:
1 2/5 - 7/10 = 14/10 - 7/10 = 7/10
1 2/5 = 7/5 = 14/10
Obliczenie
[tex]1\dfrac{2}{5}-\dfrac{7}{10}=\dfrac{7}{5}-\dfrac{7}{10}=\dfrac{\boxed{14}}{10}-\dfrac{\boxed{7}}{10}=\dfrac{\boxed{7}}{10}\\\\\\:)[/tex]
