Odpowiedź:
10.
a) [tex]\frac{2}{9} * 6 = \frac{2}{9} * \frac{6}{1} = \frac{12}{9}= 1\frac{1}{3}[/tex]
b) [tex]\frac{5}{9} * \frac{3}{10}= \frac{15}{90} = \frac{3}{18}[/tex]
c) [tex]2\frac{2}{5} * 10= \frac{12}{5} * \frac{10}{1} = \frac{120}{5} = 29[/tex]
d) [tex]\frac{3}{8} :\frac{4}{7} = \frac{3}{8} * \frac{7}{4} = \frac{21}{32}[/tex]
e) [tex]3\frac{1}{3} : \frac{5}{4} = \frac{10}{3} * \frac{4}{5} = \frac{40}{15}= 2\frac{1}{3}[/tex]
f) [tex]2\frac{2}{3} : 3\frac{5}{9} = \frac{8}{3} * \frac{32}{9} = 9\frac{13}{27}[/tex]
11.
a) NIE
b) TAK
c) TAK
d) NIE
12.
a) 8h, 40h
b) 80 dag, 175dag