срочно помогите математика 5 класс
(6 7/12-5 11/15)×(1-10/17-3/17)=
(1 4/9+2 5/6- 2 3/4)×(2 1/2-11/14) =
(4 13/18-3 7/9) ×(1/2-4/17) =
дам 10 баллов​

Ответ:

Пошаговое объяснение:

(6 7/12-5 11/15)×(1-10/17-3/17)=

(6 35/60-5 44/60)×(1-13/17)=

51/60×4/17=3/15=1/5

(1 4/9+2 5/6- 2 3/4)×(2 1/2-11/14) =(1 16/36+2 30/36-2 27/36)×(2 7/14-11/14)=

1 19/36×1 10/14=55/36×24/14

=110/42=2 13/21

(4 13/18-3 7/9) ×(1/2-4/17) =

(4 13/18-3 14/18)(17/34-8/34)=

17/18×9/34=1/4