Odpowiedź:
1.
a) [tex]11\frac{2}{5} + 4\frac{1}{4} = 11\frac{8}{20} + 4\frac{5}{20} = 15\frac{13}{20}[/tex]
b) [tex]4\frac{3}{8} - 1\frac{1}{2} = 4\frac{3}{8} - 1\frac{4}{8} = 2\frac{7}{8}[/tex]
c) [tex]7 - 4\frac{2}{7} = 2\frac{5}{7}[/tex]
2.
a) [tex]5,2 + \frac{3}{4} = 5\frac{2}{10} + \frac{3}{4} = 5\frac{4}{20} + \frac{15}{20} = 5\frac{19}{20}[/tex]
b) [tex]8\frac{3}{4} - 3,375 = 8\frac{3}{4} - 3\frac{3}{8} = 8\frac{6}{8} - 3\frac{3}{8} = 5\frac{3}{8}[/tex]
c) niestety zdjęcie jest ucięte
3.
a) [tex]3\frac{3}{7} * \frac{7}{8} = \frac{24}{7} * \frac{7}{8} = 3[/tex]
b) [tex]5\frac{3}{5} : 2\frac{1}{3} = \frac{28}{5} * \frac{3}{7} = \frac{12}{5} = 2\frac{2}{5}[/tex]
c) [tex]\frac{2}{7} * 10 * 8\frac{2}{5} = \frac{2}{7} * \frac{10}{1} * \frac{42}{5} = 24[/tex]
4.
a) [tex]2\frac{3}{5} : \frac{1}{2} = \frac{13}{5} * \frac{2}{1} = \frac{26}{5} = 5\frac{1}{5}[/tex]
b) [tex]1\frac{3}{8} : 1\frac{1}{2} = \frac{11}{8} * \frac{3}{2} = \frac{33}{16} = 2\frac{1}{16}[/tex]
