Odpowiedź:
[tex]2\frac{2}{3} +2\frac{4}{5} +\frac{1}{3} =\frac{8}{3} +\frac{14}{5} +\frac{1}{3} =\frac{40}{15} +\frac{42}{15} +\frac{5}{15} =\frac{87}{15} =5\frac{12}{15} =5\frac{4}{5}[/tex]
[tex]\frac{7}{9} +1\frac{3}{4} +\frac{1}{4} =\frac{7}{9} +\frac{7}{4} +\frac{1}{4}=\frac{28}{36} +\frac{63}{36} +\frac{9}{36} =\frac{100}{36}=2\frac{28}{36} =2\frac{7}{9} \\[/tex]
[tex]2\frac{5}{7} +7\frac{2}{5} +2\frac{2}{7} +3 \frac{3}{5} =\frac{19}{7} +\frac{37}{5} +\frac{16}{7} +\frac{18}{5} =\frac{95}{35} +\frac{259}{35} +\frac{80}{35} +\frac{126}{35} =\frac{560}35} =16[/tex]
[tex]2\frac{3}{4} +1\frac{1}{6} +4\frac{5}{6} +1\frac{2}{4} =\frac{11}{4} +\frac{7}{6} +\frac{29}{6} +\frac{6}{4}=\frac{33}{12} +\frac{14}{12} +\frac{58}{12} +\frac{18}{12} =\frac{123}{12} =10\frac{3}{12} =10\frac{1}{4}[/tex]
Szczegółowe wyjaśnienie:
