Hej!
a)
[tex]4-2\frac{2}{5}=3\frac{5}{5}-2\frac{2}{5}=1\frac{3}{5}\\\\2-1\frac{5}{8}=1\frac{8}{8}-1\frac{5}{8}=\frac{3}{8}\\\\5-3\frac{1}{7}=4\frac{7}{7}-3\frac{1}{7}=1\frac{6}{7}[/tex]
b)
[tex]3\frac{2}{9}-1\frac{5}{6}=3\frac{4}{18}-1\frac{15}{18}=2\frac{22}{18}-1\frac{15}{18}=1\frac{7}{18}\\\\5\frac{2}{7}-2\frac{3}{4}=5\frac{8}{28}-2\frac{21}{28}=4\frac{36}{28}-2\frac{21}{28}=2\frac{15}{28}\\\\2\frac{1}{3}-1\frac{5}{7}=2\frac{7}{21}-1\frac{15}{21}=1\frac{28}{21}-1\frac{15}{21}=\frac{13}{21}[/tex]
Pozdrawiam! - Julka
