Question

помогите полкатавтжвоаталкша​

Answer 1

1) 3/4= 9/12; 5/6=10/12 = 9/12+10/12=19/12= 1 7/12
2) 13/44=39/132; 7/33= 28/132
39/132 + 28/132= 67/132
3) 17/150=51/450; 1/90= 5/450
51/450+5/450= 56/450