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Elapsed Time. Mathematics Common Core 3.MD.1 Grade 3 Mindy Godwin July 15, 2013. Objective Using a number line, learners will be able to determine elapsed time by identifying starting, ending, and in-between times of activities. Common Core Mathematics Standard

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Elapsed Time

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## Elapsed Time

Mathematics

Common Core 3.MD.1

Grade 3

Mindy Godwin

July 15, 2013

• Objective

• Using a number line, learners will be able to determine elapsed time by identifying starting, ending, and in-between times of activities.

• Common Core Mathematics Standard

• 3.MD.1 Tell and write time to the nearest minute and measure time intervals in minutes. Solve word problems involving addition and subtraction of time intervals in minutes, e.g., by representing the problem on a number line diagram.

### Main Menu

Standard & Objective

Content

Posttest

Credits

Exit Show

### Content 1.1: Definition

• What is elapsed time? Let’s define it!

• The time that has passed between two events

OR…

• The difference between two times

ALSO…

• The time that can be measured between the beginning and the end of an activity

### Content 1.2: Base-60

• Reminder: Time is counted in base-60. There are sixty minutes in every hour!

• We cannot do vertical subtraction using base-10 to find elapsed time. Can we find another way?

### Content 1.3: The Number Line

Elapsed Time: 75 mins. OR 1 hour, 15 mins.

+15 minutes

• 10:00 am

• Start

• Begin

• Base-60

• Hour

• Finish

• End

• 9:00 am

• 10:15 am

+60 minutes

### Content 1.4: Real-World Situations

Can you think of any real-world situations where elapsed time is important?

• What about baking a cake?

• What about getting ready before school?

Elapsed Time Video

• 12:15 pm

• 12:21 pm

• 12:14 pm

• 12:07 pm

### Melanie’s volleyball game started at 1:00 pm and ended at 2:45 pm. How long did the game last?

• 1 hour, 15 minutes

• 1 hour, 45 minutes

• 2 hours

• 2 hours, 45 minutes

• 11:00 am

• 12:00 pm

• 10:40 am

• 11:10 am

• 1:41 pm

• 1:53 pm

• 1:38 pm

• 2:01 pm

• 4:00 pm

• 3:45 pm

• 3:55 pm

• 3:50 pm

### References

donaldsonm. (2010, June 1). Elapsed Time. Retrieved from SMARTExchange: http://exchange.smarttech

.com/details.html?id=d657b291-ac40-4a5b-a4d9-9bf574e680fc

Everette, M. (2013, January 11). Teaching Elapsed Time: Strategies That Work. Retrieved from Scholastic: http://www.scholastic.com/teachers/top-teaching/2013/01/teaching-elapsed-time-strategies-work

Scholastic. (2013). Measurement: Elapsed Time.Retrieved from StudyJamz: http://studyjams.scho

lastic.com/studyjams/jams/math/measurement/elapsed-time.htm