a) 2[latex] frac{4}{5} [/latex] + 7[latex] frac{5}{6} [/latex] = 2[latex] frac{24}{30} [/latex] + 7[latex] frac{25}{30} [/latex] = 9[latex] frac{49}{30} [/latex] = 10[latex] frac{19}{30} [/latex] b) 3[latex] frac{1}{9} [/latex] - [latex] frac{3}{4} [/latex] = 2[latex] frac{10}{9} [/latex] - [latex] frac{3}{4} [/latex] = 2[latex] frac{40}{36} [/latex] - [latex] frac{27}{36} [/latex] = 2[latex] frac{13}{36} [/latex] c) 5[latex] frac{7}{9} [/latex] - 3[latex] frac{2}{3} [/latex] = 5[latex] frac{7}{9} [/latex] - 3[latex] frac{6}{9} [/latex] = 2[latex] frac{1}{9} [/latex] Ta liczba jest wieksza o 2[latex] frac{1}{9} [/latex]
