Хэлп ми!!!!!!!!!100 баллов!!!!

Question

Хэлп ми!!!!!!!!!
100 баллов!!!!

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Answer 1

1) ( 2 1/2 )^2 = ( 5/2)^2 = 25/4 = 6 1/4
2) 6 1/4 • 8/15 = 25/4 • 8/15 = 10/3 = 3 1/3
3) 3 1/3 - 5/9 = 3 3/9 - 5/9 = 2 12/9 - 5/9 = 2 7/9
Ответ 2 7/9