A). 4 2/3 + 1/4 * (1 7/9 - 4/9) 1. 1 7/9 - 4/9 = 1 3/9 2. 1/4 * 1 3/9 = 12/36 = 1/3 3. 4 2/3 + 1/3 = 15/3 = 5 б) 13 1/3 * ( 18,1 - (3^2+6,1) 1. 3^2+6.1 = 9+6.1 = 15.1 2. 18.1 - 15.1 = 3 3. 13 1/3 * 3 = 120/3 = 40