690. Выполните действия и проверьте. 1) 485*4 5780:6 1273.5 7496:3 2) 153.40 2960:20 156.50 7800:30 1248:2 986.9 3618:6 1395.4 4840:40 7280:70 196.30 127.60 4270:20 2385. 3 7980:30 948.8 9100:70 125.60 6000:40 291.30 236-30 6390:40 189. 8 180.50 9000:600 170. 40 390. 20 5490: 30

Решение: 1) * $$485 \cdot 4 = 1940$$ * $$5780 : 6 = 963.33$$ * $$1273 \cdot 5 = 6365$$ * $$7496 : 3 = 2498.67$$ * $$1248 : 2 = 624$$ * $$986 \cdot 9 = 8874$$ * $$3618 : 6 = 603$$ * $$1395 \cdot 4 = 5580$$ * $$4270 : 20 = 213.5$$ * $$2385 \cdot 3 = 7155$$ * $$7980 : 30 = 266$$ * $$948 \cdot 8 = 7584$$ * $$236 - 30 = 206$$ * $$6390 : 40 = 159.75$$ * $$189 \cdot 8 = 1512$$ * $$180 \cdot 50 = 9000 2) * $$153 \cdot 40 = 6120$$ * $$2960 : 20 = 148$$ * $$156 \cdot 50 = 7800$$ * $$7800 : 30 = 260$$ * $$4840 : 40 = 121$$ * $$7280 : 70 = 104$$ * $$196 \cdot 30 = 5880$$ * $$127 \cdot 60 = 7620$$ * $$9100 : 70 = 130$$ * $$125 \cdot 60 = 7500$$ * $$6000 : 40 = 150$$ * $$291 \cdot 30 = 8730$$ * $$9000 : 600 = 15$$ * $$170 \cdot 40 = 6800$$ * $$390 \cdot 20 = 7800$$ * $$5490 : 30 = 183 Ответ: Результаты вычислений указаны выше.