Question

выполнить действие.(-2 1/8)*(-1 29/51)+(-1 23/42)*3 1/13-(-4 2/3)*6

Answer 1

$1)-2 \frac{1}{8}*(-1 \frac{29}{51} )= \frac{17}{8}* \frac{80}{51}= \frac{17*8*10}{8*17*3}= \frac{10}{3} \\ \\ \\ 2)-1 \frac{23}{42}*3 \frac{1}{13}= -\frac{65}{42}* \frac{40}{13}= -\frac{13*5*5*8}{7*8*13} = -\frac{25}{7} \\ \\ 3) (-4 \frac{2}{3} )*6= -\frac{14}{3}*6=-28 \\ \\ 4) \frac{10}{3}- \frac{25}{7}-(-28)=28+ \frac{70-75}{21}=28- \frac{5}{21}=27 \frac{16}{21}$