А) 1-к=3/5+1/10 ; б) t+1=4/9+2/3 ; в)x+2 целых3/8=5целых1/4-1целая3/8 уровнения

А) 1 - к = 3/5 + 1/10;

к = 1 - 3/5 - 1/10 = 10/10 - 6/10 - 1/10 = (10 - 6 - 1)/10 = 3/10;

Ответ: к = 3/10.

б) t + 1 = 4/9 + 2/3;

t = 4/9 + 2/3 - 1 = 4/9 + 6/9 - 9/9 = (4 + 6 - 9)/9 = 1/9;

Ответ: t = 1/9.

в) x + 2 3/8 = 5 1/4 - 1 3/8;

х = (5 * 4 + 1)/4 - (1 * 8 + 3)/8 - (2 * 8 + 3)/8 = 21/4 - 11/8 - 19/8 = 42/8 - 11/8 - 19/8 = (42 - 11 - 19)/8 = 12/8 = 3/2;

Ответ: 3/2.