Question

444,445,446 три номера решите пожалуйста, просто скоро в школу...

Answer 1

Ответ:

Пошаговое объяснение:

444

$4,8+(-7\frac{5}{9}) =\frac{48}{10} -\frac{68}{9} =\frac{432}{90} -\frac{680}{90}= \frac{-248}{90}=\frac{-124}{45} =- 2\frac{34}{45}$

$5\frac{2}{7} +(-6,4)=\frac{37}{7} -\frac{64}{10} =\frac{370}{70} -\frac{448}{70} =\frac{-78}{70} =\frac{-39}{35} =-1\frac{4}{35}$

$-1,4+\frac{1}{5} =-\frac{14}{10} +\frac{1}{5} =\frac{-14}{10} +\frac{2}{10} =\frac{-12}{10} =-1\frac{2}{10} =-1,2$

445

x-2.76=-4

x=-4+2.76

x=-1.24

$x-8\frac{1}{4} =-3.2\\x=-3.2+8\frac{1}{4} =\frac{-32}{10} +\frac{33}{4} =\frac{-64}{20} +\frac{165}{20} =\frac{101}{20} =5\frac{1}{20} =5.05$

$y-2\frac{7}{9} =-8\\y=-8+2\frac{7}{9} =-\frac{8}{1} +\frac{25}{9} =-\frac{72}{9} +\frac{25}{9} =\frac{-47}{9} =-5\frac{2}{9}$

446

$x-7.21=-8\frac{1}{20} \\x=-8\frac{1}{20} +7.21=-\frac{161}{20} +\frac{721}{100} =\frac{-805}{100}+\frac{721}{100} = \frac{-84}{100} =-0.84$

$m-1\frac{3}{4}=-3.7\\m=-3.7+1\frac{3}{4} =\frac{-37}{10} +\frac{7}{4} =\frac{-74}{20} +\frac{35}{20} =\frac{-39}{20} =-1\frac{19}{20} =-1.95$

$y-2=-4\frac{1}{3} \\y=-4\frac{1}{3} +2\\y=-\frac{13}{3} +\frac{2}{1} =-\frac{13}{3} +\frac{6}{3} =-\frac{7}{3} =-2\frac{1}{3}$