Number 1 wants you to set up proportions so four numbers equal to 2/1 would be: 6/3 8/4 10/5 12/6, and so on. I'm not sure what they're asking when they say the sum of the first two numbers is equal to 4.8
I think I could help you
Have fun and feel free to ask me something new.
Or we can prove some properities without calculating by details
3 x 1/8 bottom left. The third one
9 o clock for 8 degree below zero 14 below zero at midnight