Odpowiedź:
[tex]1) 2 \frac{1}{4} + 3 \frac{5}{6} = \frac{9}{4} + \frac{23}{6} = \frac{27}{12 } + \frac{46}{12} = \frac{73}{12} = 6 \frac{1}{12} [/tex]
[tex]2)2 \frac{3}{5} \times 1 \frac{1}{4} = \frac{13}{5} \times \frac{5}{4} = \frac{13}{4} = 3 \frac{1}{4} [/tex]
[tex]3)2 \frac{1}{3} \div \frac{5}{3} = \frac{7}{3} \times \frac{3}{5} = \frac{7}{5} = 1 \frac{2}{5} [/tex]
[tex]4)2.73 + 13.2 = 15.93 \\ [/tex]
[tex]5)23.4 \times 2.3 = 53.82[/tex]
[tex]6)0.72 \div 0.8 = 0.9[/tex]
