Odpowiedź:
a)
[tex]1\frac{5}{11}+\frac{7}{11}\\ \frac{16}{11}+\frac{7}{11}\\ \frac{23}{11}\\ 2\frac{1}{11}[/tex]
b)
[tex]2\frac{1}{3}+1\frac{2}{5}\\ (2+1)+(\frac{1}{3}+\frac{2}{5})\\ 3+\frac{11}{15}\\ 3\frac{11}{15}[/tex]
c)
[tex]1\frac{4}{11}-\frac{9}{11}\\ \frac{15}{11}-\frac{9}{11}\\ \frac{6}{11}\\[/tex]
d)
[tex]6\frac{7}{15}-2\frac{2}{5}\\ (6-2)+(\frac{7}{15}-\frac{2}{5})\\ 4+\frac{1}{15}\\ 4\frac{1}{15}[/tex]
Szczegółowe wyjaśnienie:
