решите примеры пожалуйста...

 

 

1)4 целых 8/11 - (5 целых 2/11 - 3 целых 7/11)

2) 16 целых 10/11 - (1 целая 4/11 + 7 целых 9/11)

3) 1 целая 5/9 + 6/9

 

Спасибо.

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