§ 2. Додавання і віднімання звичайних дробів » 254

Знайдіть різницю: 1) 5 – 6/7 = 4(7 - 6)/7 = 41/7; 2) 9 – 43/8 = 4(8 - 3)/8 = 45/8; 3) 32/5 – 11/3 = 2(6 - 5)/15 = 21/15; 4) 43/4 – 5/8 = 4(6 - 5)/8 = 41/8; 5) 53/8 – 21/12 = 3(9 - 2)/24 = 37/24; 6) 47/15 – 11/6 = 3(14 - 5)/30 = 39/30 = 33/10; 7) 11/5 – 1/2 = 12/10 – 5/10 = (12 - 5)/10 = 7/10; 8) 63/5 – 22/3 = 69/15 – 210/15 = 3(24 - 10)/15 = 314/15; 9) 91/2 – 75/6 = 93/6 – 75/6 = 1(9 - 5)/6 = 14/6; 10) 72/5 – 211/20 = 78/20 – 211/20 = 4(28 - 11)/20 = 417/20; 11) 23/25 – 13/10 = 26/50 – 115/50 = (56 - 15)/50 = 41/50; 12) 85/12 – 22/3 = 85/12 – 28/12 = 5(17 - 8)/12 = 59/12 = 53/4.