№1: Вычислите: 1) ((1/8 + 10/18) * 9/35); 2) (9.5 : (6 + 2/3))

1) (1/8 + 10/18) = 9/72 + 40/72 = 49/72; (49/72 * 9/35) = 441/(72*35) = 441/2520 = 49/280 = 7/40. Отв.: 7/40. 2) (9.5 : (6 + 2/3)) = 9.5 : 20/3 = 28.5/20 = 1.425. Отв.: 1.425.