Answer:
1-70mm
2-77m
Explanation:
so to do this, take the first one as an exmple, to find the unknown line on the ground I added 15+8 to find the total on the bottom
still on the first question, to find the unknown number on the side, I subtracted 12-7
I hope this makes any sense, but I dont know
whats important is that you have the answers.