\[\boxed{\text{23\ (23).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[1)\ 106 + 294 + 530 =\]
\[= (106 + 294) + 530 =\]
\[= 400 + 530 = 930.\]
\[530 + 106 + 294 = 930.\]
\[2)\ 472 + 280 + 198 =\]
\[= (472 + 198) + 280 =\]
\[= 670 + 280 = 950.\]
\[198 + 472 + 280 = 950.\]
\[3)\ 620 + 137 + 209 = 966.\]
\[209 + 620 + 137 = 966.\]