7.
a)
[tex]7 \frac{1}{5} - 4 \frac{3}{5} = 6 \frac{6}{5} - 4 \frac{3}{5} = 2 \frac{3}{5} [/tex]
Spr.
[tex]4 \frac{3}{5} + 2 \frac{3}{5} = 6 \frac{6}{5} = 7 \frac{1}{5} [/tex]
b)
[tex]5 \frac{2}{7} - 3 \frac{5}{7} = 4 \frac{9}{7} - 3 \frac{5}{7} = 1 \frac{4}{7} [/tex]
Spr.
[tex]3 \frac{5}{7} + 1 \frac{4}{7} = 4 \frac{9}{7} = 5 \frac{2}{7} [/tex]
8.
a)
[tex] \frac{6}{7} + \frac{4}{7} = 1 \frac{3}{7} [/tex]
b)
[tex]1 \frac{3}{4} + \frac{2}{4} = 2 \frac{1}{4} [/tex]
c)
[tex]17 \frac{3}{5} + 1 \frac{4}{5} = 19 \frac{2}{5} [/tex]
d)
[tex]4 \frac{6}{8} + 2 \frac{3}{8} = 7 \frac{1}{8} [/tex]
e)
[tex] 1\frac{3}{11} + 4 \frac{9}{11} = 6 \frac{1}{11} [/tex]
f)
[tex]3 \frac{5}{6} + 15 \frac{4}{6} = 19 \frac{3}{6} [/tex]
Myślę że pomogłem ;)
