Question

(5/9/10 - (7/4/5) - (-2,8)​

Answer 1

Ответ:

Пошаговое объяснение:

1)  7 13/28 - (3 9/28 - 5 3/13) = (7 13/28 -  3 9/28)+5 3/13 = 4 4/28 + 5 3/13 =

= 4 1/7+5 3/13 => НОК(7;13) = 91 => 4 13/91 +5 21/91 =  9 34/91.

2)  (5 9/10 - 7 4/5) - (-2.8) = (5 9/10 - 7 8/10) +2.8 = -(7 8/10 - 5 9/10)+2.8 =

= -2(8-9)/10+2.8 = -1(10+8-9)/10 +2.8 = -1 9/10+2.8 = -1.9+2.8 = 0.9.