Odpowiedź:
a.
[tex] = \frac{3}{10} \times ( \frac{6}{15} - \frac{5}{15} ) = \frac{3}{10} \times \frac{1}{15} = \frac{3}{150} = \frac{1}{50} [/tex]
b.
[tex] = 2 \frac{1}{4} + \frac{5}{7} \times \frac{7}{5} - \frac{1}{2} = 2 \frac{1}{4} + 1 - \frac{2}{4} = 3 \frac{3}{4} [/tex]
C.
[tex] = (21 \frac{3}{4} - 7 \frac{1}{4} ) \times 4 = 14 \frac{1}{2} \times 4 = \frac{29}{2} \times 4 = 58[/tex]
d.
[tex] = 0.36 + 0.64 = 1[/tex]
e.
[tex] = 0.23 - 0.23 = 0[/tex]
f.
[tex] = 0.835 - 0.04 = 0.795[/tex]
G.
[tex] = (2 \frac{10}{15} - \frac{9}{15}) \times \frac{1}{4} - \frac{1}{4} = \frac{31}{15} \times \frac{1}{4} - \frac{1}{4} = \frac{31}{60} - \frac{15}{60} = \frac{16}{60} = \frac{4}{15} [/tex]
h.
[tex]= 5 \frac{1}{3}[/tex]
i.
[tex]=5 \times \frac{20}{13} = \frac{100}{13} = 7 \frac{9}{13} [/tex]
