Odpowiedź:
77. Oblicz:
[tex]a) \frac{5}{7} + \frac{9}{7} = \frac{14}{7} = 2[/tex]
[tex]b) \frac{6}{11} + \frac{9}{11} = \frac{15}{11} = 1 \frac{4}{11}[/tex]
[tex]c) \frac{4}{5} + 2\frac{4}{5} = 2 \frac{8}{5} = 3\frac{3}{5}[/tex]
[tex]d) 5 \frac{17}{18} + \frac{5}{18} = 5 \frac{22}{18} = 6\frac{4}{18} = 6\frac{2}{9}[/tex]
[tex]e) 6\frac{3}{10} + 7 \frac{9}{10} = 6\frac{12}{10} = 7\frac{2}{10} = 7 \frac{1}{5}[/tex]
[tex]f) 6\frac{7}{8} + 4\frac{5}{8} = 10 \frac{12}{8} = 11\frac{4}{8} = 11\frac{1}{2}[/tex]
[tex]g) \frac{3}{8} + \frac{5}{8} + \frac{7}{8} = \frac{15}{8} = 1\frac{7}{8}[/tex]
[tex]h) \frac{7}{13} + \frac{8}{13} + \frac{12}{13} = \frac{27}{13} = 2\frac{1}{13}[/tex]
[tex]i) 3\frac{3}{14} + \frac{3}{14} + \frac{9}{14} = 3\frac{15}{14} = 4\frac{1}{14}[/tex]
[tex]j) \frac{5}{7} + 4\frac{6}{7} + \frac{1}{7} = 4 \frac{12}{7} = 5\frac{5}{7}[/tex]
[tex]k) 12\frac{3}{11} + 1\frac{5}{11} + 6\frac{9}{11} = 19\frac{17}{11} = 20\frac{6}{11}[/tex]
[tex]l) 15\frac{5}{12} + 5\frac{5}{12} + 6\frac{11}{12} = 26\frac{21}{12} = 27\frac{9}{12} = 27\frac{3}{4}[/tex]
Szczegółowe wyjaśnienie:
