Question

1)5/16*4/5*9/25*5/9 2)19/25*40/57*5/36*9/16 3)2 2/3*1/5*3/4*10 4)18 1/3*1 2/11*1 4/5*15 выполните умножение:

Answer 1

$\frac{5}{16} * \frac{4}{5} * \frac{9}{25} * \frac{5}{9} = \frac{5*4*9*5}{16*5*25*9} = \frac{1*1*1*1}{4*5*1*1} = \frac{1}{20} = 0,05$

$\frac{19}{25} * \frac{40}{57} * \frac{5}{36} * \frac{9}{16} = \frac{19*40*5*9}{25*57*36*16} = \frac{1*8 *1 *1}{1*3*4*16} = \frac{1*1*1*1}{1*3*4*2} = \frac{1}{24}$

$2 \frac{2}{3} * \frac{1}{5} * \frac{3}{4} *10 = \frac{8*1*3*10}{3*5*4*1} = \frac{2*1*1*2}{1*1*1*1} = \frac{4}{1} = 4$

$18 \frac{1}{3} * 1 \frac{2}{11} *1 \frac{4}{5} *15 = \frac{18*3+1}{3} * \frac{1*11+2}{11} * \frac{1*5+4}{5} * \frac{15}{1} = \frac{55*13*9*15}{3*11*5*1} = \\ \\ =\frac{1*13*3*15}{1*1*1*1} = \frac{585}{1} =585$