Question

-3 1/4 *(2.4+4 3/4) пж помогите очень сложный

Answer 1

-13/4*(24/10+ 19/4)= -13/4* (48/20+ 95/20)= -13/4* 143/20= - 1859/80= -23 19/80 или -23,2375

Answer 2

$- 3 frac{1}{4} times (2 frac{2}{5} + 4 frac{3}{4} ) =$
$2 frac{2}{5} + 4 frac{3}{4} = 2 frac{2 times 4}{20} + 4 frac{3 times 5}{20} = \ = 4 frac{8}{20} + 4 frac{15}{20} = 8 frac{23}{20} = 9 frac{3}{20}$
$- 3 frac{1}{4} times 9 frac{3}{20} = - frac{13}{4} times frac{183}{20} = \ = - frac{2379}{80} = - 29 frac{59}{80}$