ПоМоГиТе ✓222 пункты а,б,в и г по желанию))) МАТЕМАТИКА 4класс

1.
$\frac{4}{3}* \frac{7}{6}= \frac{28}{18}$
$5= \frac{90}{18}$
$\frac{90}{18}- \frac{28}{18}= \frac{62}{18} = \frac{31}{9}$
$\frac{31}{9}* \frac{27}{31}=3$
2.
$\frac{4}{3}/ \frac{2}{3}=2$
$\frac{3}{25}/ \frac{1}{2} = \frac{6}{25}$
$2- \frac{6}{25} =1 \frac{19}{25}$
$1 \frac{19}{25} * \frac{1}{2} = \frac{44}{25} * \frac{1}{2}= \frac{22}{25}$
3.
$3/ \frac{15}{4} = \frac{3}{1} / \frac{15}{4} = \frac{4}{5}$
$\frac{12}{5}* \frac{5}{2}=6$
$\frac{4}{5}+6=6 \frac{4}{5}$
$6 \frac{4}{5}-3 \frac{5}{6} =6 \frac{24}{30}-3 \frac{25}{30} =2 \frac{29}{30}$