Ответ:270 : 2 = 135.139 + 505 = 644.630 − 350 = 280.720 : 12 = 60.699 + 152 = 851.364 · 2 = 728.852 − 470 = 382.355 : 5 = 71.215 · 4 = 860.1000 − 763 = 237.