ALWAYS use significant figure rules. Remember that these rules apply to all numbers that are measurements.
A caterpillar tries to climb straight up a wall two meters high, but for every 2 cm up it climbs, it slides down 1 cm. Eventually, it reaches the top. When it reaches the top, it does not pull itself over so it will slide down 1 cm. At this point, the caterpillar was exhausted and fell to the ground. What is the total displacement?
0 up
0 down
0 n/a
199 up
199 down
199 n/a
200 up
200 down
200 n/a