Помогите пожалуйста
1) 2*7 - 3*5 = 14 - 15 = - 1
2) 2/3*60 = 2*20 = 40
3) 3*8/9 = 8/3
4) 10*1,8 - 16 = 18 - 16 = 2
5) 4*4 - 2*9 = 16 - 18 = - 2
6) 3/4*80 = 3*20 = 60
7) 10*7/10 = 7
8) 19 - 10*1,7 = 19 - 17 = 2