1В.29
дробь буду показывать / так
1) (825/100 * 10/11) = (75/10 * 1/1) = 75/10 = 75
2) 17,5 - 7,5 = 10
3) (35/3 : 3/8) = ( 35/1 : 1/8) = 35/8 = 4.3/8
4) 4.3/8 + 3.10/5 = (4 + 3) * (15/40 * 12/40) = 7.27/40
5) 10 + 7.27/40 = 17.27/40
6) 12.6/10 : 2.1/2 = (126/10 : 2/5) = 126/25 = 5.1/25
7) 12.5/10 + 17.27/40 = (12 + 17) * (20/40 + 27/40) = 30.7/40
8)30.7/40 - 5.1/25 = (30 - 5) * (35/200 - 8/200) = 25.27/200 = 25,135
Ответ:25,135