2) -11 because it’s like regular subtracting but switch the signs 
3) 12 because the double negative (subtracting) turns into a positive (adding) 
4) -30 because it’s regular multiplication but it’s negative 
5) 5 regular division and the double negative makes it positive 
6) 35 regular multiplication and the double negative makes it positive 
7) -45,-3,-2.3,0,0.5,7 
8) a= > greater then
 b= < less then
 c= > greater then
That’s all I could see in the picture if you need more help or explaining let me know and I’ll try to explain it better for you