Question

выполните действия ( 3 2/5 - 5)*(31/48 + 7/24)

Answer 1

$(3 frac{2}{5}-5)cdot( frac{31}{48}+ frac{7}{24} )=-1 frac{1}{2} \\ 1) 3 frac{2}{5}-5= frac{17}{5} - frac{5}{1}= frac{17-25}{5}= -frac{8}{5}\\ 2) frac{31}{48}+ frac{7}{24} = frac{31+14}{48}= frac{45}{48} \\ 3) - frac{8}{5}cdot frac{45}{48}=- frac{9}{6}=-1 frac{1}{2}$

Answer 2

спасибо

Answer 3

(3²/₅-5)*(³¹/₄₈+⁷/₂₄)=(3²/₅-4⁵/₅)*(³¹/₄₈+¹⁴/₄₈)= - 1³/₅*⁴⁵/₄₈= - 1³/₅*¹⁵/₁₆=
- ⁸/₅*¹⁵/₁₆= - ³/₂= - 1¹/₂ или = - 1,5.