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

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