Question

Помогите пожалуйста

2) (3 4/5 × (-4 5/19)) : (-3)

3) - 25,6×(6 1/6)
------------------------------
-16× 7 2/5

4) - 27 × 2 2/9
---------------------------
-5 4/9 × 27/49​

Answer 1

Ответ:

Пошаговое объяснение:

$\displaystyle\\(3\frac{4}{5} *(-4\frac{5}{19})):(-3)=(\frac{19}{5} *(-\frac{81}{19})):(-3)=\frac{81}{5}*\frac{1}{3}=\frac{27}{5} =5.4$

$\displaystyle\\\frac{-25.6*(-6\dfrac{1}{6}) }{-16*7\dfrac{2}{5} }=\frac{-25.6*(-\dfrac{37}{6}) }{-16*\dfrac{37}{5} }=-\frac{256*37*5}{16*10*6*37} =-\frac{16}{12}=-\frac{4}{3} =-1\frac{1}{3}$

$\displaystyle\\\frac{-27*2\dfrac{2}{9} }{-5\dfrac{4}{9}*\dfrac{27}{49} } =\frac{27*\dfrac{20}{9} }{\dfrac{49}{9}*\dfrac{27}{49}}=\frac{60}{3} =20$