2целых7/9x15= 28x1целая3/4= 1ц3/5x2ц1/2= 3ц1/2x3/5= 3ц1/3:30= 6:1ц1/2= 1ц3/4:10ц1/2= 5ц/1/5:13/15=

[latex]28*1\frac{3}{4}=28*\frac{7}{4}=49\\1\frac{3}{5}*2\frac{1}{2}=\frac{8}{5}*\frac{5}{2}=4\\3\frac{1}{2}*\frac{3}{5}=\frac{7}{2}*\frac{3}{5}=\frac{21}{10}=2\frac{1}{10}\\3\frac{1}{3}:30=\frac{10}{3}*\frac{1}{30}=\frac{1}{9}\\6:1\frac{1}{2}=6:\frac{3}{2}=6*\frac{2}{3}=4\\1\frac{3}{4}:10\frac{1}{2}=\frac{7}{4}:\frac{21}{2}=\frac{7}{4}*\frac{2}{21}=\frac{1}{6}\\5\frac{1}{5}:\frac{13}{15}=\frac{26}{5}*\frac{15}{13}=6[/latex]

2 7/9*15=25/9*15=125/3=41 2/3 28x1 3/4=28 84/4=49 1 3/5x2 1/2=8/5*5/2=4 3 1/2x3/5=7/2*3/5=21/10=2,1 3 1/3:30=10/3*1/30=1/9 6:1 1/2=6*2/3=4 1 3/4:10 1/2=7/4*2/21=1/6 5  1/5:13/15= 26/5*15/13=6