а) (21/2)² 8/15 - 5/9 = (441/4) 8/15 - 5/9= 352/15 - 5/9= (3523)/(153) - 5/9= 1056/45 - 5/9= (1056 - 225)/45= 831/45= 277/15
Ответ: 277/15
б) (21/3 1 2/7)³ 2/9 = (7 19/7)³ 2/9= 19³ 2/9= 6859 2/9= 13718/9
Ответ: 13718/9
в) (3 1/14 - 2 5/21) (2.7 - 2.1) = (43/14 - 47/21) 0.6= (129/42 - 94/42) 0.6= 35/42 0.6= 35/70= 1/2
Ответ: 1/2
а) (21/2)² 8/15 - 5/9 = (441/4) 8/15 - 5/9
= 352/15 - 5/9
= (3523)/(153) - 5/9
= 1056/45 - 5/9
= (1056 - 225)/45
= 831/45
= 277/15
Ответ: 277/15
б) (21/3 1 2/7)³ 2/9 = (7 19/7)³ 2/9
= 19³ 2/9
= 6859 2/9
= 13718/9
Ответ: 13718/9
в) (3 1/14 - 2 5/21) (2.7 - 2.1) = (43/14 - 47/21) 0.6
= (129/42 - 94/42) 0.6
= 35/42 0.6
= 35/70
= 1/2
Ответ: 1/2