Odpowiedź:
[tex]a) \frac{(1.85 + 0.35) \times 7.7}{3 - 2.986} = \frac{2.2 \times 7.7}{0.014} = \frac{16.94}{0.014} = 1210[/tex]
[tex]b)(4 \frac{5}{12} - \frac{4}{ 2\frac{2}{3} } ) \times 1.8 = (\frac{53}{12} - \frac{4}{ \frac{8}{3} } ) \times 1.8 = ( \frac{53}{12} - \frac{3}{2} ) \times 1.8 = ( \frac{53}{12} - \frac{18}{12} ) \times 1.8 = \frac{35}{12} \times 1.8 = \frac{21}{4} = 5 \frac{1}{4} [/tex]
[tex]c) \frac{2 \frac{1}{8} - 1 \frac{2}{3} }{1 \frac{3}{8} \div 1 \frac{1}{3} } = \frac{2 \frac{3}{24} - 1 \frac{16}{24} }{ \frac{11}{8} \div \frac{4}{3} } = \frac{ \frac{11}{24} }{ \frac{11}{8} \times \frac{3}{4} } = \frac{ \frac{11}{24} }{ \frac{33}{32} } = \frac{11}{24} \times \frac{32}{33} = \frac{4}{9} [/tex]
[tex]d)1 \frac{9}{16} \times 3.2 + \frac{48}{ \frac{3}{5} \div \frac{7}{8} } = \frac{25}{16} \times \frac{16}{5} + \frac{48}{ \frac{3}{5} \times \frac{8}{7} } = 5 + \frac{48}{ \frac{24}{35} } = 5 + 70 = 75[/tex]
[tex]e) \frac{1.75 \times 3 \frac{1}{21} + \frac{1}{6} }{0.36 + \frac{2}{3} } = \frac{ \frac{7}{4} \times \frac{64}{21} + \frac{1}{6} }{ \frac{9}{25} + \frac{2}{3} } = \frac{ \frac{16}{3} + \frac{1}{6} }{ \frac{77}{75} } = \frac{ \frac{11}{2} }{ \frac{77}{75} } = \frac{11}{2} \times \frac{75}{77} = \frac{75}{14} [/tex]
[tex]f) \frac{2.4 \times ( \frac{5}{6} {)}^{2} - \frac{1}{6} }{ \frac{1}{3} + 1.5} = \frac{ \frac{12}{5} \times \frac{25}{36} - \frac{1}{6} }{ \frac{1}{3} + \frac{3}{2} } = \frac{ \frac{5}{3} - \frac{1}{6} }{ \frac{11}{6} } = \frac{ \frac{3}{2} }{ \frac{11}{6} } = \frac{3}{2} \times \frac{6}{11} = \frac{9}{11} [/tex]
