Выполните 472 473пожалуйста

472) а) [latex]\frac{9}{10} * \frac{5}{6} = \frac{9*5}{10*6} = \frac{3}{4} [/latex] б) [latex] \frac{6}{25}* \frac{20}{21} = \frac{6*20}{25*21} = \frac{2*4}{5*7} = \frac{8}{35} [/latex] в) [latex] \frac{17}{30}* \frac{26}{51} = \frac{17*26}{30*51} = \frac{13}{15*3} = \frac{13}{45} [/latex] г) [latex] \frac{40}{7}* \frac{14}{5} = \frac{40*14}{7*5} = 2*8 = 16 [/latex] д) [latex] \frac{57}{37}*\frac{74}{86} = \frac{57*74}{37*86} = \frac{57}{43} = 1 \frac{14}{43} [/latex] е) [latex] \frac{81}{115} * \frac{46}{81} = \frac{81*46}{115*81} = \frac{46}{115} [/latex] ж) [latex] \frac{3}{16} * 4 = \frac{3*4}{16} = \frac{3}{4} [/latex] з) [latex]23* \frac{5}{46} = \frac{23*5}{46} = \frac{5}{2} = 2 \frac{1}{2} [/latex] и) [latex] \frac{5}{13} * 39 = \frac{5*39}{13} = 15 [/latex] к) [latex]5*2 \frac{1}{5} = \frac{5*11}{5} = 11 [/latex] л) [latex]3 \frac{3}{5} * 1 \frac{1}{9} = \frac{18*10}{5*9} = 2*2 = 4[/latex] м) [latex]4 \frac{2}{7} * 2 = \frac{30*2}{7} = \frac{60}{7} = 8 \frac{4}{7} [/latex] н) [latex]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} [/latex] о) [latex]2 \frac{2}{25} * 1\frac{9}{16} = \frac{52*25}{25*16} = \frac{13}{4} = 3\frac{1}{4} [/latex] п) [latex] \frac{13}{43} * 8 \frac{7}{26} = \frac{13*215}{43*26} = \frac{215}{86} = 3 \frac{43}{86} = 3 \frac{1}{2} [/latex] 473)  [latex] \frac{2}{5}m = \frac{2*1}{5*2} = \frac{1}{5} [/latex] [latex]\frac{2}{5}m = \frac{2*2}{5*5} = \frac{4}{25}[/latex] [latex]\frac{2}{5}m = \frac{2*5}{5*2} = 1[/latex] [latex]\frac{2}{5}m = \frac{2*15}{5*8} = \frac{3}{4}[/latex] [latex]\frac{2}{5}m = \frac{2*15}{5*16} = \frac{3}{8}[/latex] [latex]\frac{4}{9}x = \frac{4*1}{9*4} = \frac{1}{9}[/latex] [latex]\frac{4}{9}x = \frac{4*4}{9*9} = \frac{16}{81}[/latex] [latex]\frac{4}{9}x = \frac{4*9}{9*2} = 2[/latex]