Question

выполните 472 473
пожалуйста

Answer 1

472) а) $frac{9}{10} * frac{5}{6} = frac{9*5}{10*6} = frac{3}{4}$

б) $frac{6}{25}* frac{20}{21} = frac{6*20}{25*21} = frac{2*4}{5*7} = frac{8}{35}$

в) $frac{17}{30}* frac{26}{51} = frac{17*26}{30*51} = frac{13}{15*3} = frac{13}{45}$

г) $frac{40}{7}* frac{14}{5} = frac{40*14}{7*5} = 2*8 = 16$

д) $frac{57}{37}*frac{74}{86} = frac{57*74}{37*86} = frac{57}{43} = 1 frac{14}{43}$

е) $frac{81}{115} * frac{46}{81} = frac{81*46}{115*81} = frac{46}{115}$

ж) $frac{3}{16} * 4 = frac{3*4}{16} = frac{3}{4}$

з) $23* frac{5}{46} = frac{23*5}{46} = frac{5}{2} = 2 frac{1}{2}$

и) $frac{5}{13} * 39 = frac{5*39}{13} = 15$

к) $5*2 frac{1}{5} = frac{5*11}{5} = 11$

л) $3 frac{3}{5} * 1 frac{1}{9} = frac{18*10}{5*9} = 2*2 = 4$

м) $4 frac{2}{7} * 2 = frac{30*2}{7} = frac{60}{7} = 8 frac{4}{7}$

н) $2 frac{4}{15} * 6 frac{6}{11} = frac{34}{15} * frac{72}{6} = frac{34*72}{15*6}= frac{34*4}{5} = frac{136}{5} = 27 frac{1}{5}$

о) $2 frac{2}{25} * 1frac{9}{16} = frac{52*25}{25*16} = frac{13}{4} = 3frac{1}{4}$

п) $frac{13}{43} * 8 frac{7}{26} = frac{13*215}{43*26} = frac{215}{86} = 3 frac{43}{86} = 3 frac{1}{2}$

473) 
$frac{2}{5}m = frac{2*1}{5*2} = frac{1}{5}$

$frac{2}{5}m = frac{2*2}{5*5} = frac{4}{25}$

$frac{2}{5}m = frac{2*5}{5*2} = 1$

$frac{2}{5}m = frac{2*15}{5*8} = frac{3}{4}$

$frac{2}{5}m = frac{2*15}{5*16} = frac{3}{8}$

$frac{4}{9}x = frac{4*1}{9*4} = frac{1}{9}$

$frac{4}{9}x = frac{4*4}{9*9} = frac{16}{81}$

$frac{4}{9}x = frac{4*9}{9*2} = 2$