Роздiл 2. Вирази i тотожностi » 47

Обчисліть: 1) 121/6 + 82/3 = 121/6 + 84/6 = 205/6; 2) 161/8 + 25/6 = 16 + 2 + (1^(\3)/8 + 5^(\4)/6) = 18 + (3+20)/24 = 18 + 23/24 = 1823/24; 3) 7 – 23/13 = 613/13 – 23/13 = (6 – 2) + (13/13 – 13/13) = 4 + 10/13 = 410/13; 4) 81/10 – 52/3 = (8 – 5) + (1^(\3)/10 – 2^(\10)/3) = 3 + (3/30 – 20/30) = 2 + (33/30 – 20/30) = = 213/30. 5) 21/3 • 3/14 = 7/3 • 3/14 = 7/14 = 1/2; 6) 52/5 • 31/3 = 27/5 • 10/3 = 9/1 • 2/1 = 18/1 = 18; 7) 23/4 : 13/8 = 11/4 : 11/8 = 11/4 • 8/11 = 8/4 = 2; 8) 3/10 : 24/5 = 3/10 : 14/5 = 3/10 • 5/14 = 3/2 • 1/14 = 3/28.