Temperature changes

Think of a number line. Moving up adds, and moving down subtracts.

1. At the start of the day the temperature was 4°C. By noon it had dropped 6°C. What was the temperature at noon? Write the number of degrees.
2. At the start of the day the temperature was −10°C. By noon it had dropped 10°C. What was the temperature at noon? Write the number of degrees.
3. At the start of the day the temperature was 9°C. By noon it had risen 1°C. What was the temperature at noon? Write the number of degrees.
4. At the start of the day the temperature was −1°C. By noon it had risen 5°C. What was the temperature at noon? Write the number of degrees.
5. At the start of the day the temperature was −10°C. By noon it had dropped 4°C. What was the temperature at noon? Write the number of degrees.
6. At the start of the day the temperature was −5°C. By noon it had dropped 3°C. What was the temperature at noon? Write the number of degrees.
7. At the start of the day the temperature was 10°C. By noon it had dropped 9°C. What was the temperature at noon? Write the number of degrees.
8. At the start of the day the temperature was −10°C. By noon it had risen 4°C. What was the temperature at noon? Write the number of degrees.
9. At the start of the day the temperature was −3°C. By noon it had dropped 9°C. What was the temperature at noon? Write the number of degrees.
10. At the start of the day the temperature was 0°C. By noon it had risen 18°C. What was the temperature at noon? Write the number of degrees.
11. At the start of the day the temperature was 6°C. By noon it had dropped 1°C. What was the temperature at noon? Write the number of degrees.
12. At the start of the day the temperature was −14°C. By noon it had risen 7°C. What was the temperature at noon? Write the number of degrees.
13. At the start of the day the temperature was −24°C. By noon it had risen 27°C. What was the temperature at noon? Write the number of degrees.
14. At the start of the day the temperature was 16°C. By noon it had risen 12°C. What was the temperature at noon? Write the number of degrees.
15. At the start of the day the temperature was −30°C. By noon it had risen 20°C. What was the temperature at noon? Write the number of degrees.
16. At the start of the day the temperature was 30°C. By noon it had dropped 11°C. What was the temperature at noon? Write the number of degrees.
17. At the start of the day the temperature was 37°C. By noon it had risen 7°C. What was the temperature at noon? Write the number of degrees.
18. At the start of the day the temperature was −12°C. By noon it had dropped 60°C. What was the temperature at noon? Write the number of degrees.
19. At the start of the day the temperature was −49°C. By noon it had dropped 20°C. What was the temperature at noon? Write the number of degrees.
20. At the start of the day the temperature was −1°C. By noon it had dropped 35°C. What was the temperature at noon? Write the number of degrees.