Odpowiedź:
zad.1
[tex]a) \: \: \frac{17}{7} = 2 \frac{3}{7} \\ b) \: \: 2 \frac{3}{8} = \frac{19}{8} \\ c) \: \: \frac{17}{6} [/tex]
zad 2
[tex]a) \: \: 3 \frac{5}{6} + \frac{1}{4} = 3 \frac{10}{12} + \frac{3}{12} = 3 \frac{13}{12 } = 4 \frac{1}{12} \\ [/tex]
[tex]b) \: \: 2 \frac{3}{4} - \frac{5}{8} = 2 \frac{6}{8} - \frac{5}{8} = 2 \frac{1}{8} [/tex]
[tex]c) \: \: 1 \frac{1}{2} + 1 \frac{1}{3} = 1 \frac{3}{6} + 1 \frac{2}{6} = 2 \frac{5}{6} [/tex]
[tex]d) \: \: 2 \frac{3}{7} + 5 \frac{4}{5} = 2 \frac{15}{35} + 5 \frac{28}{35} = 7 \frac{43}{35} = 8 \frac{8}{35} [/tex]
[tex]e) \: \: 1 - \frac{2}{3} = \frac{3}{3} - \frac{2}{3} = \frac{1}{3} [/tex]
[tex]g) \: \: 1 \frac{3}{5} \cdot \: 1 \frac{3}{4} = \frac{8}{5} \cdot \: \frac{7}{4} = \frac{56}{20} = 2 \frac{16}{20} = 2 \frac{4}{5} [/tex]
[tex]h) \: \: 2 \frac{1}{4} \div 1 \frac{1}{8} = \frac{9}{4} \div \frac{9}{8} = \frac{9}{4} \cdot \frac{8}{9} = \frac{8}{4} = 2[/tex]
[tex] i) \: \: 1 \frac{2}{3} \cdot 3 \frac{1}{5} = \frac{5}{3} \cdot \: \frac{16}{5} = \frac{16}{3} = 5 \frac{1}{3} [/tex]
[tex]j) \: \: 1 \frac{1}{2} : \frac{3}{4} = \frac{3}{2} \cdot \frac{4}{3} = \frac{4}{2} = 2[/tex]
zad.3
[tex]a) \: \: 4.2 + 2.5 = 6.7 \\ b) \: \: 3.46 + 5.4 = 8.86 \\ c) \: \: 8.6 - 5.5 = 3.1 \\ d) \: \: 5.8 - 2.19 = 3.61 \\ e) \: \: 3.3 \cdot 0.2 = 0.66 \\ f) \: \: 0.7 \cdot 0.04 = 0.028 \\ g) \: \: 3.2 : 4 = 0.8 \\ h) \: \: 6.4 : 0.08 = 80[/tex]
