Вычисли рационально.
250 + 170 + 150
580 + 240 + 120
360 + 270 + 340 390 + 250 + 110
560 + 230 - 170
270 + 150 - 50
250 + 170 + 150
580 + 240 + 120
360 + 270 + 340 390 + 250 + 110
560 + 230 - 170
270 + 150 - 50
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(250+150)+170=570
(580+120)+240=940
(360+340)+(390+110)+(270+250)=1720
(560+230)-170=620
270+(150-50)=370