(1 8/21-19/42- 3 5/28)*14/15

Question

(1 8/21-19/42- 3 5/28)*14/15

Comments

= -2 1/4

Answer 1

1) 1 8/21 - 19/42 = 58/42 - 19/42 = 39/42 = 13/14
2) 13/14 - 3 5/28 = 26/28 - 2 33/28 = - 2 7/28 = - 2 1/4
3) - 2 1/4 • 14/15 = - 9/4 • 14/15 = - 21/10 = - 2 1/10
Ответ ( - 2 1/10 ) или 2,1