ГДЗ по математике 5 класс Ерина рабочая тетрадь Часть 1, 2 Часть 1 | Страница 24

\[\boxed{\mathbf{Страница\ 24.\ }\mathbf{Еуроки\ - \ ДЗ\ без\ мороки}}\]

\[\boxed{\mathbf{4.\ }}\]

\[\boxed{\mathbf{5.\ }}\]

\[\mathbf{а)}\ точка\ A;\]

\[\textbf{б)}\ точка\ E;\]

\[\textbf{в)}\ точка\ F;\]

\[\textbf{г)}\ точка\ K;\]

\[\textbf{д)}\ точка\ B;\]

\[\textbf{е)}\ точка\text{\ P.}\]

\[\boxed{\mathbf{6.\ }}\]

\[12 + 7 = 19\]

\[8 + 0 = 8\]

\[\boxed{\mathbf{7.\ }}\]

\[(300 + 85) + 15 =\]

\[= 300 + (85 + 15) =\]

\[= 300 + 100 = 400\]

\[(73 + 48) + 27 =\]

\[= 48 + (73 + 27) =\]

\[= 48 + 100 = 148\]

\[328 + (50 + 522) =\]

\[= (328 + 522) + 50 =\]

\[= 900 + 50 = 900\]

\[999 + (1 + 600) =\]

\[= (999 + 1) + 600 =\]

\[= 1000 + 600 = 1600\]

\[485 + 648 + 515 =\]

\[= (485 + 515) + 648 =\]

\[= 1000 + 648 = 1648\]

\[421 + 526 + 274 =\]

\[= 421 + (526 + 274) =\]

\[= 421 + 800 = 1221\]

\[348 + 222 + 52 + 78 =\]

\[= (348 + 52) + (222 + 78) =\]

\[= 400 + 300 = 700\]

\[524 + 307 + 1476 + 393 =\]

\[= (524 + 1476) + (307 + 393) =\]

\[= 2000 + 700 = 2700\]

\[\boxed{\ \mathbf{8.}}\]

\[\textbf{а)}\ 237 + 548 + 623 + 312 =\]

\[= (327 + 623) + (548 + 312) =\]

\[= 860 + 860 = 1720\]

\[\textbf{б)}\ 315 + 842 + 228 + 425 =\]

\[= (315 + 425) + (842 + 228) =\]

\[= 740 + 1070 = 1810\]

\[\textbf{в)}\ 296 + (422 + 504) =\]

\[= (296 + 504) + 422 =\]

\[= 800 + 422 = 1222\]

\[= 450 + 450 + 450 + 450 + 225 =\]

\[= 2025\]