Решебник по математике 5 класс Мерзляк ФГОС Задание 306

 

\[\boxed{\mathbf{306\ (306)}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]

\[\angle CDE = 152{^\circ};\ \ \ \angle CDA = 98{^\circ}.\]

\[\angle ADE = \angle CDE - \angle CDA =\]

\[= 152{^\circ} - 98{^\circ} = 54{^\circ}.\]

\[Ответ:54{^\circ}.\]

\[\boxed{\mathbf{306}\mathbf{\ (271)}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]

\[1)\ (134 + x) - 583 = 426\]

\[134 + x = 426 + 583\]

\[x = 1009 - 134\]

\[x = 875\]

\[Ответ:875.\]

\[2)\ (x - 506) + 215 = 429\]

\[x - 506 = 429 - 215\]

\[x = 214 + 506\]

\[x = 720\]

\[Ответ:720.\]

\[3)\ (942 - a) - 126 = 254\]

\[942 - a = 254 + 126\]

\[a = 942 - 380\]

\[a = 562\]

\[Ответ:562.\]

\[4)\ 475 - (x - 671) = 325\]

\[x - 671 = 475 - 325\]

\[x = 150 + 671\]

\[x = 821\]

\[Ответ:821.\]

\[5)\ 403 - (634 - a) = 366\]

\[634 - a = 403 - 366\]

\[a = 634 - 37\]

\[a = 597\]

\[Ответ:597.\]

\[6)\ 3128 - (m + 425) = 1509\]

\[m + 425 = 3128 - 1509\]

\[m = 1619 - 425\]

\[m = 1194\]

\[Ответ:1194.\]