1. Выполни вычисления.

(140:7 + 80) + 900 = 20 + 80 + 900 = 1000. (30 + 630:9) – (18:4 + 8) = 30 + 70 – (4.5 + 8) = 96.5. 880 – 810:9 + 10 = 880 – 90 + 10 = 800. 340 + 60:6:4 = 340 + 2.5 = 342.5. 175 – (75:5 + 60) = 175 – (15 + 60) = 100. 45 – 5 – 200 + 15:3 = 45 – 5 – 200 + 5 = -155.