Question

помогите решить срочно​

Answer 1

Ответ:

-25.5

Пошаговое объяснение:

1. $2frac{1}{6} :1frac{2}{3} = frac{2*6+1}{6} :frac{1*3+2}{3} = frac{13}{6} : frac{5}{3} =frac{13}{6} *frac{3}{5} = frac{13*3}{6*5} =frac{39}{30} = frac{13}{10} = 1 frac{3}{10} = 1.3$

2. $8frac{1}{7}* 2frac{4}{19} = frac{8*7+1}{7} *frac{2*19+4}{19} = frac{57}{7} * frac{42}{19}= frac{57*42}{7*19} = frac{2394}{133} = 18$

3. $18+8frac{4}{5} = frac{18}{1} + frac{8*5+4}{5} =frac{18}{1} +frac{44}{5} = frac{5*18}{5*1}+ frac{1*44}{1*5} = frac{90}{5} + frac{44}{5} = frac{90+44}{5} =frac{134}{5} = 26frac{4}{5} = 26.8$

4. 1.3 - 26.8 = -25.5