Odpowiedź:
a)
[tex] \frac{2}{5} + \frac{1}{5} = \frac{3 }{5} [/tex]
b)
[tex] \frac{5}{23} + \frac{13}{23} = \frac{18}{23} [/tex]
2.
a)
[tex] \frac{15}{7} + \frac{8}{7} = 2\frac{1}{7} + 1\frac{1}{7} = 3 \frac{2}{7} [/tex]
b)
[tex] \frac{15}{23} + \frac{20}{23} = \frac{35}{23} = 1\frac{12}{23} [/tex]
3
a)
[tex]1 \frac{1}{4} + 7 \frac{1}{4} = 8 \frac{2}{4} [/tex]
b)
[tex]2 \frac{4}{7} + 9 \frac{2}{7} = 11 \frac{6}{7} [/tex]
3.
a)
[tex]2 \frac{3}{5} + 5 \frac{4}{5} = 6 \frac{7}{5} = 7 \frac{3}{5} [/tex]
b)
[tex]5 \frac{4}{7} + 4 \frac{3}{7} = 10 \frac{0}{7} [/tex]
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