Выполните действие 4/5 : 3/13 4/9 : 16/45 55 : 11/12 18/19 : 6

4/5 : 3/13=4/5*13/3=52/15=3 7/15 4/9 : 16/45=4/9*45/16=5/4=1 1/4 55 : 11/12=55*12/11=60 18/19 : 6 =18/19*1/6=3/19

[latex] \frac{4}{5} : \frac{3}{13} = \frac{4*13}{5*3} = \frac{52}{15} =3 \frac{7}{15} [/latex] [latex] \frac{4}{9} : \frac{16}{45} = \frac{4*45}{9*16} = \frac{1*5}{1*4} = 1\frac{1}{4} [/latex] [latex]55: \frac{11}{12} = \frac{55*12}{1*11} = \frac{5*12}{1} =60[/latex] [latex] \frac{18}{19} :6= \frac{18*1}{19*6} = \frac{3}{19} [/latex]