Hej!
Poziom B :
[tex] \frac{7}{9} - \frac{1}{9} = \frac{7 - 1}{9} = \frac{6}{9} = \frac{2}{3} [/tex]
[tex] \frac{5}{8} + \frac{3}{8} = \frac{5 + 3}{8} = \frac{8}{8} = 1[/tex]
[tex] \frac{7}{12} + \frac{8}{12} = \frac{7 + 8}{12} = \frac{15}{12} = \frac{5}{4} = 1 \frac{1}{4} [/tex]
[tex] \frac{5}{8} - \frac{1}{8} = \frac{5 - 1}{8} = \frac{4}{8} = \frac{1}{2} [/tex]
[tex] \frac{4}{9} + \frac{8}{9} = \frac{4 + 8}{9} = \frac{12}{9} = \frac{4}{3} = 1 \frac{1}{3} [/tex]
[tex] \frac{11}{15} + \frac{7}{15} = \frac{11 + 7}{15} = \frac{18}{15} = \frac{6}{5} = 1 \frac{1}{5} [/tex]
[tex] \frac{5}{6} - \frac{3}{6} = \frac{5 - 3}{6} = \frac{2}{6} = \frac{1}{3} [/tex]
[tex] \frac{17}{20} + \frac{17}{20} = \frac{17 + 17}{20} = \frac{34}{20} = \frac{17}{10} = 1 \frac{7}{10} [/tex]
Poziom C :
[tex]5 \frac{3}{7} + 2 \frac{6}{7} = 7 \frac{9}{7} =8 \frac{2}{7} [/tex]
[tex]3 \frac{5}{8} - 1 \frac{1}{8} = 2 \frac{4}{8} = 2 \frac{1}{2} [/tex]
[tex]6 \frac{2}{5} + 5 \frac{3}{5} = 11 \frac{5}{5} = 12[/tex]
[tex]7 \frac{5}{6} - 3 \frac{1}{6} = 4 \frac{4}{6} = 4 \frac{2}{3} [/tex]
[tex]4 \frac{2}{5} + 3 \frac{4}{5} = 7 \frac{6}{5} = 8 \frac{1}{5} [/tex]
[tex]7 \frac{3}{4} - 2 \frac{1}{4} = 5 \frac{2}{4} = 5 \frac{1}{2} [/tex]
[tex]3 \frac{5}{6} + 2 \frac{5}{6} = 5 \frac{10}{6} = 6 \frac{4}{6} = 6 \frac{2}{3} [/tex]
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Pozdrawiam! - Julka
