Find the change in depth between two positions

Find how far apart the two values are on a number line.

1. A diver is at 7 m (below sea level means negative). She swims to −18 m. How many metres did she move up or down? Write the size of the change.
2. A diver is at −7 m (below sea level means negative). She swims to 16 m. How many metres did she move up or down? Write the size of the change.
3. A diver is at 20 m (below sea level means negative). She swims to −2 m. How many metres did she move up or down? Write the size of the change.
4. A diver is at 5 m (below sea level means negative). She swims to −16 m. How many metres did she move up or down? Write the size of the change.
5. A diver is at 0 m (below sea level means negative). She swims to 5 m. How many metres did she move up or down? Write the size of the change.
6. A diver is at −3 m (below sea level means negative). She swims to −5 m. How many metres did she move up or down? Write the size of the change.
7. A diver is at 18 m (below sea level means negative). She swims to −6 m. How many metres did she move up or down? Write the size of the change.
8. A diver is at 20 m (below sea level means negative). She swims to −14 m. How many metres did she move up or down? Write the size of the change.
9. A diver is at −4 m (below sea level means negative). She swims to −5 m. How many metres did she move up or down? Write the size of the change.
10. A diver is at 47 m (below sea level means negative). She swims to 1 m. How many metres did she move up or down? Write the size of the change.
11. A diver is at −32 m (below sea level means negative). She swims to −51 m. How many metres did she move up or down? Write the size of the change.
12. A diver is at 4 m (below sea level means negative). She swims to −22 m. How many metres did she move up or down? Write the size of the change.
13. A diver is at 34 m (below sea level means negative). She swims to 40 m. How many metres did she move up or down? Write the size of the change.
14. A diver is at −19 m (below sea level means negative). She swims to 77 m. How many metres did she move up or down? Write the size of the change.
15. A diver is at −4 m (below sea level means negative). She swims to −41 m. How many metres did she move up or down? Write the size of the change.
16. A diver is at 68 m (below sea level means negative). She swims to −78 m. How many metres did she move up or down? Write the size of the change.
17. A diver is at −81 m (below sea level means negative). She swims to −67 m. How many metres did she move up or down? Write the size of the change.
18. A diver is at 175 m (below sea level means negative). She swims to −172 m. How many metres did she move up or down? Write the size of the change.
19. A diver is at 284 m (below sea level means negative). She swims to 115 m. How many metres did she move up or down? Write the size of the change.
20. A diver is at 283 m (below sea level means negative). She swims to −23 m. How many metres did she move up or down? Write the size of the change.