Question

3 целых7/12-2целых 11/12

Answer 1

3 ц. 7/12 - 2ц. 11/12= 2/3

Answer 2

(2+1+7/12)-11/12=(2+12/12+7/12)-11/12=2 19/12-2 11/12=1 8/12

Answer 3

ну помогло?