Question

выполните деление:17/30:30/34; 3:1целая2/3; 15/28:40/49; 1целая5/7:4.

Answer 1

$frac{17}{30}: frac{30}{34}= frac{17}{30}* frac{34}{30}= frac{17}{15}*frac{17}{30}= frac{289}{450} \ \ 3:1 frac{2}{3} = frac{3}{1} :frac{5}{3} = frac{3}{1} *frac{3}{5} = frac{9}{5} \ \ frac{15}{28} :frac{40}{49} =frac{15}{28} *frac{49}{40} =frac{3}{4} *frac{7}{8} =frac{21}{32} \ \ 1 frac{5}{7} :4=frac{12}{7}:frac{4}{1} =frac{12}{7} *frac{1}{4} =frac{3}{7} *frac{1}{1} =frac{3}{7}$