Elementary Test Prep: Math 4 Test (Grades 4) Elapsed Time

Elapsed time is the time that passes from the start to the end of an activity.

Example 1

Mrs. Freebern's Lunch starts at 12:45 P.M. If it lasts 30 minutes, at what time will it end?

One Way
Count forward on a clock.

Mrs. Freebern's lunch will end at 1:15 P.M.

Another Way
Count backwards on a clock.

Mrs. Freebern wants to read the class a book. The book must end by 12:45 P.M. The book will last 20 minutes. Find the start time of the book.

Mrs. Freebern should start reading the book at 12:25 P.M.

24 hours = 1 day

Use A.M. for times beginning at 12:00 midnight and before 12:00 noon	Use P.M. for times beginning at 12:00 noon and before 12:00 midnight.

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