Выполните действия: 2/9+5/18 17/20-5/12 11/15-3/10+1/45

Question

Выполните действия:
2/9+5/18
17/20-5/12
11/15-3/10+1/45

Answer 1

2/9+5/18=4/18+5/18=9/18=1/2
17/20-5/12= 204/240-100/240=104/240
11/15-3/10+1/45
11/15-3/10=110/150-45/150=65/150
65/150+1/45=2925/6750+150/6750=3075/6750
11/15-3/10+1/45=3075/6750