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Countdown!

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| Objective Consulting Inc. (OCI) | |
| Calculate the number of seconds between any two events: find out how long it will be until the millennium, until your birthday, or simply how long you have been alive. Answers are also expressed in days, hours, and minutes. | |
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| Levels: | Elementary, Middle School (6-8), High School (9-12) |
| Languages: | English |
| Resource Types: | Calculators |
| Math Topics: | Terms/Units of Measure |
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