Odpowiedź:
[tex]2.a)1 \frac{1}{7} \times 1 \frac{3}{4} = \frac{8}{7} \times \frac{7}{4} = 2 \\ 1 \frac{1}{3} \div 12 = \frac{4}{3} \times \frac{1}{12} = \frac{1}{9} \\3 \frac{1}{6} - 1.4 = 3 \frac{1}{6} - 1 \frac{4}{10} = 3 \frac{5}{30} - \frac{12}{30} = 2 \frac{23}{30} [/tex]
[tex]b)2 \frac{1}{3} \div 3.2 = \frac{7}{3} \times \frac{10}{32} = \frac{70}{96} \\ 1.04 \times 3 \frac{1}{8} = 1.04 \times 3.125 = 3.25 \\ 5.75 + 1 \frac{3}{5} = 5.75 + 1.6 = 7.35[/tex]
[tex]c)5.12 \div (5 - 2.44) = 5.12 \div 2.56 = 2 \\ {2}^{3} + (3 \frac{1}{5} - 1 \frac{1}{3} ) = 8 + (3 \frac{3}{15} - 1 \frac{5}{15} ) = 8 + 1 \frac{14}{15} = 9 \frac{14}{15} \\ 13.5 - 3 \frac{1}{2} \div 5.25 = 13.5 - 3.5 \div 5.25 = 13.5 -0.6 = 12.9[/tex]
