Odpowiedź:
3. a) 5/9
b)
[tex]1 \frac{4}{12} [/tex]
c)
[tex]1 \frac{2}{5} [/tex]
d)
[tex]4 \frac{2}{7} [/tex]
e) 1/3
f)
[tex]3 \frac{5}{8} [/tex]
g)
[tex]1 \frac{4}{10} [/tex]
h)
[tex]6 \frac{6}{11} [/tex]
i)
[tex] \frac{3}{6} = \frac{1}{2} [/tex]
j)
[tex]5 \frac{12}{14} = 5 \frac{6}{7} [/tex]
k)
[tex]5 \frac{7}{9} [/tex]
l)
[tex]1 \frac{3}{5} [/tex]
4)
a)
[tex] \frac{1}{5} + 3 \frac{4}{5} = 4[/tex]
[tex] \frac{4}{5} + 3 \frac{4}{5} = 3 \frac{8}{5} = 4 \frac{3}{5} [/tex]
[tex]1 \frac{1}{5} + 3 \frac{4}{5} = 4 \frac{5}{5} = 5[/tex]
[tex]10 \frac{2}{5} + 3 \frac{4}{5} = 13 \frac{6}{5} = 14 \frac{1}{5} [/tex]
[tex]20 + 4 \frac{4}{5} = 24 \frac{4}{5} [/tex]
[tex]8 \frac{2}{5} + 4 \frac{4}{5} = 12 \frac{6}{5} = 13 \frac{1}{5} [/tex]
b)
[tex]8 - 1 \frac{4}{7} = 6 \frac{3}{7} [/tex]
[tex]9 \frac{5}{7} - 1 \frac{4}{7} = 8 \frac{1}{7} [/tex]
[tex]11 \frac{6}{7} - 1 \frac{4}{7} = 10 \frac{2}{7} [/tex]
[tex]18 \frac{1}{7} - 1 \frac{4}{7} = 16 \frac{4}{7} [/tex]
[tex]20 \frac{2}{7} - 1 \frac{4}{7} = 18 \frac{5}{7} [/tex]
[tex]33 \frac{3}{7} - 1 \frac{4}{7} = 31 \frac{6}{7} [/tex]
