1. Вычислите: a) (73 + 112) : 16; b) 69 ⋅ 190 – 6843 + 68 ⋅ 250 : 65.

1. a) (73 + 112) : 16 = 185 : 16 = 11.5625. b) 69 ⋅ 190 – 6843 + 68 ⋅ 250 : 65 = 13110 – 6843 + 17000 : 65 = 13110 – 6843 + 261.5385 = 13110 – 6581.4615 = 6528.5385.