\[\boxed{\ \mathbf{206\ (206)}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]
\[\boxed{\ \mathbf{206}\mathbf{\ (172)}.\ Еуроки\ - \ ДЗ\ без\ мороки}\]
\[1)\ (146 + 322) + 178 =\]
\[= 146 + (322 + 178) =\]
\[= 146 + 500 = 646\]
\[2)\ 784 + (179 + 116) =\]
\[= (784 + 116) + 179 =\]
\[= 900 + 179 = 1079\]
\[3)\ 625 + 481 + 75 + 219 =\]
\[= (625 + 75) + (481 + 219) =\]
\[= 700 + 700 = 1400\]
\[4)\ 427 + 88 + 273 + 112 =\]
\[= (427 + 273) + (88 + 112) =\]
\[= 700 + 200 = 900\]