1.Найдите значение выражения 305*407 -Располажите дроби в 4.Расположите в порядке...

1.
$305 \times 407 = 124137$
2.
$\frac{1}{8} < \frac{1}{6} < \frac{3}{13} < \frac{4}{15}$
3.
$7 \frac{14}{19} + 8 \frac{15}{19} - 3 \frac{11}{19} = \\ = 12 \frac{18}{19}$
4.
$5 \frac{8}{33} - 4 \frac{18}{33} + 15 \frac{28}{33} = \\ = 16 \frac{ 18 }{33} = 16 \frac{6}{11}$
5.
$4 \frac{26}{57} - (8 \frac{19}{57} - 8 \frac{45}{57} ) = \\ = 4 \frac{26}{57} - ( - \frac{36}{57} ) = \\ = 4 \frac{62}{57} = 5 \frac{5}{57}$
6.
$5 + 9 = 14$
7.
$\frac{23}{3} \times \frac{9}{4} = \frac{69}{4} = 17 \frac{1}{4} = 17.25$
8.
$\frac{27}{5} \times \frac{10}{9} = 6$
9.
$\frac{7}{2} \times \frac{4}{7} = 2$
10.
$\frac{17}{3 } \times \frac{10}{9} = \frac{170}{27} = 6 \frac{8}{27}$