6-3-3=-0 its - cause 3+3=6 and if 3-6-3 is o but its already o then just put a little line net to the zero
Wow, u could of scanned the page dude. XD
Answer:
9 millimeters is the answer.
It goes in 1 and 1/2 times. You can solve this by dividing 12 by 8