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

2 7/9*15=25/9*15=125/3=41 2/328x1 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