Помогите пож 

 

1) (1ц 2/15 +3ц 4/15)- 2 ц 8/15 

 

2) 4-3ц 1/8+5 ц 3/8 

 

3) 6ц 5/9 -(2ц 5/9 +7/9) 

 

4) (2ц 6/7+3ц 4/7)-2ц 6/7 

 

5) 7ц 6/13-2ц 11/13-2/13 

 

Заранее спасибо 

 

 

 

 

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