4/16 помножить на 1 целую 3/5:(7 целых1/2*1/10-3/5)-3целых1/2:4целых2/3

4/16 * 1 3/5 : (7 1/2 * 1/10 - 3/5) - 3 1/2 : 4 2/3 = 1 11/12.

1) 7 1/2 * 1/10 = (7 * 2 + 1)/2 * 1/10 = 15/2 * 1/10 = (3 * 5)/(2 * 5 * 2) = 3/(2 * 2) = 3/4;

2) 3/4 - 3/5 = (3 * 5)/20 - (3 * 4)/20 = 15/20 - 12/20 = (15 - 12)/20 = 3/20;

3) 4/16 * 1 3/5 = 4/16 * (1 * 5 + 3)/5 = 4/16 * 8/5 = (4 * 8)/(16 * 5) = (2 * 2 * 8)/(2 * 8 * 5) = 2/5;

4) 2/5 : 3/20 = 2/5 * 20/3 = (2 * 20)/(5 * 3) = (2 * 4 * 5)/(5 * 3) = (2 * 4)/3 = 8/3 = 2 2/3;

5) 3 1/2 : 4 2/3 = 7/2 : 14/3 = 7/2 * 3/14 = (7 * 3)/(2 * 2 * 7) = 3/4;

6) 2 2/3 - 3/4 = 8/3 - 3/4 = 32/12 - 9/12 = 23/12 = 1 11/12.