Вычисли наиболее удобным способом:
(834 + 98) − 234;
781 − (56 + 681);
592 + (294 + 108);
75 + 139 + 25 + 61;
2 * (5 * 69);
(5 * 27) * 6.
(834 + 98) − 234 = (834 − 234) + 98 = 600 + 98 = 698;
781 − (56 + 681) = (781 − 681) − 56 = 100 − 56 = 44;
592 + (294 + 108) = (592 + 108) + 294 = 700 + 294 = 994;
75 + 139 + 25 + 61 = (75 + 25) + (139 + 61) = 100 + 200 = 300;
2 * (5 * 69) = 69 * (2 * 5) = 69 * 10 = 690;
(5 * 27) * 6 = 27 * (5 * 6) = 27 * 30 = (27 * 3) * 10 = (20 + 7) * 3 * 10 = (20 * 3 + 7 * 3) * 10 = (60 + 21) * 10 = 81 * 10 = 810.