((1 1/4) - 5/8)* 10 2/3 - 7 1/3
1) 1 1/4 - 5/8 = 5/4 - 5/8=5/8 2) 5/8 * 10 2/3 = 5/8 * 32/3 = 20/3 3) 20/3 - 7 1/3 = 20/3 - 22/3 = - 2/3
Спасибо