а) (21/2)² 8/15 - 5/9 = (441/4) 8/15 - 5/= 352/15 - 5/= (3523)/(153) - 5/= 1056/45 - 5/= (1056 - 225)/4= 831/4= 277/15
Ответ: 277/15
б) (21/3 1 2/7)³ 2/9 = (7 19/7)³ 2/= 19³ 2/= 6859 2/= 13718/9
Ответ: 13718/9
в) (3 1/14 - 2 5/21) (2.7 - 2.1) = (43/14 - 47/21) 0.= (129/42 - 94/42) 0.= 35/42 0.= 35/7= 1/2
Ответ: 1/2
а) (21/2)² 8/15 - 5/9 = (441/4) 8/15 - 5/
= 352/15 - 5/
= (3523)/(153) - 5/
= 1056/45 - 5/
= (1056 - 225)/4
= 831/4
= 277/15
Ответ: 277/15
б) (21/3 1 2/7)³ 2/9 = (7 19/7)³ 2/
= 19³ 2/
= 6859 2/
= 13718/9
Ответ: 13718/9
в) (3 1/14 - 2 5/21) (2.7 - 2.1) = (43/14 - 47/21) 0.
= (129/42 - 94/42) 0.
= 35/42 0.
= 35/7
= 1/2
Ответ: 1/2