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- 1. Open EndedBefore people commonly used watches and clocks, they used the sun to keep track of time. Device used was a sun dial
- 2. Open EndedTime Zones
- 3. Open EndedTime Zones 2
- 4. Open Ended
- 5. Open EndedHistory of Time Zones
- 6. Open EndedHistory of Time Zones 2
- 7. Open EndedTime Zone Facts
- 8. Open Ended
- 9. Open EndedInternational Date Line
- 10. Open EndedSteps to calculate time zone problems
- 11. Open EndedTime Zone Problem
- 12. Open EndedTime Zone Problem 2
- 13. Open EndedTime Zone Problem 3
- 14. Open EndedTime Zone Problem 4
- 15. Open EndedTime Zone Problem
- 16. Open EndedTime Zone Problems
- Answer choicesTagsAnswer choicesTags