Нормер 1 а) 3/5*1/2 = б) 2 1/4*5/18 = в) 3/4*6 = Номер 2 а)3/10 : 2/7 = в) 10 : 1 1/4=...

1.а) $\frac{3}{5}* \frac{1}{2} = \frac{3}{10} = 0.3$
б) $2 \frac{1}{4} * \frac{5}{18} = \frac{9*5}{72} = \frac{45}{72}$
в) $\frac{3}{4} *6 = \frac{18}{4} =4,5$
2.а) $\frac{3}{10} : \frac{2}{7} = \frac{3*7}{10*2} = \frac{21}{20} =1.05$
б) $10 : 1 \frac{1}{4} = 10 : \frac{5}{4} = \frac{10*4}{5} = \frac{40}{5} =8$
в) $( 2\frac{2}{5} )^{2} = ( \frac{12}{5})^{2} = \frac{144}{25} =5.76$