a)
[tex]3 \frac{2}{7} -1 \frac{6}{8} = 3 \frac{16}{56} - 1 \frac{42}{56} = 2 \frac{72}{56} - 1 \frac{42}{56} = 1 \frac{30}{56} = 1 \frac{15}{28} [/tex]
b)
[tex]2 \frac{3}{8} - 1 \frac{9}{10} = 2 \frac{15}{40} - 1 \frac{36}{40} = 1 \frac{55}{40} - 1 \frac{36}{40} = \frac{19}{40} [/tex]
c)
[tex]4 \frac{3}{5} - 2 \frac{5}{7} = 4 \frac{21}{35} - 2 \frac{25}{35} = 3 \frac{56}{35} - 2 \frac{25}{36} = 1 \frac{31}{35} [/tex]
Myślę że pomogłem ;)
