So if your at 0 and you add 9 left but then you go 4 right so you would do 9-4 and then you go left 6 more so you would take the sum of 9-4 which would be 5 and you add 6 so the car would have only traveled 11cm left
The intended message was not received properly due to poor body language. Come up with a situation, this is a typical reason for it to be interpreted incorrectly.
