Question

2)(7/16-(-5/24)):(-1целая 15/16)= 3)(10/21-25/28):(-11/14+24/35)=? Помогите

Answer 1

Минус на минус-плюс⇒
2)$(\frac{7}{16} + \frac{5}{24}): (-1\frac{15}{16})=( \frac{7*3+5*2}{48} )*(- \frac{16}{31} )=( \frac{31}{3} )*(- \frac{1}{31} )=- \frac{1}{3}$
3)$( \frac{10}{21} - \frac{25}{28} ):(- \frac{11}{14} + \frac{24}{35} )= (\frac{10*4-25*3}{84}):( \frac{-11*5+24*2}{70} )= (-\frac{35}{84}) : (-\frac{7}{70})=$$\frac{35}{84} * \frac{70}{7}= \frac{50}{12}= \frac{25}{6}=4 \frac{1}{6}$