Cześć!
Szczegółowe wyjaśnienie:
Zadanie 1.
a)
[tex] \frac{7}{9} + \frac{6}{9} = \frac{7 + 6}{9} = \frac{13}{19} [/tex]
b)
[tex]4 \frac{2}{7} + 3 \frac{4}{7} = (4 + 3) + ( \frac{2}{7} + \frac{4}{7} ) = 7 + \frac{6}{7} = 7 \frac{6}{7} [/tex]
Zadanie 2.
a)
[tex]5 - \frac{7}{12} = \frac{60 - 7}{12} = \frac{53}{12} = 4 \frac{5}{12} [/tex]
b)
[tex]6 \frac{4}{5} - 2 \frac{2}{5} = (6 - 2) + ( \frac{4}{5} - \frac{2}{5} ) = 4 + \frac{2}{5} = 4 \frac{2}{5} [/tex]
