Вычислите разность.а) 1 1/2-2/3; в) 1 1/8-1/4; д) 2 3/10-4/15; б)

а) 1 1/2 - 2/3 = (1 * 2 + 1)/2 - 2/3 = 3/2 - 2/3 = 9/6 - 4/6 = (9 - 4)/6 = 5/6;

в) 1 1/8 - 1/4 = (1 * 8 + 1)/8 - 1/4 = 9/8 - 1/4 = 9/8 - 2/8 = (9 - 2)/8 = 7/8;

д) 2 3/10 - 4/15 = (2 * 10 + 3)/10 - 4/15 = (20 + 3)/10 - 4/15 = 23/10 - 4/15 = 69/30 - 8/30 = (69 - 8)/30 = 61/30;

б) 1 1/4 - 1/3 = (1 * 4 + 1)/4 - 1/3 = 5/4 - 1/3 = 15/12 - 4/12 = (15 - 4)/12 = 11/12;

г) 1 2/3 - 5/6 = (1 * 3 + 2)/3 - 5/6 = 5/3 - 5/6 = 10/6 - 5/6 = (10 - 5)/6 = 5/6;

е) 3 1/4 - 5/6 = (3 * 4 + 1)/4 - 5/6 = 13/4 - 5/6 = 39/12 - 10/12 = (39 - 10)/12 = 29/12.