Elapsed Time

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# Elapsed Time - PowerPoint PPT Presentation

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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Presentation Transcript

### Elapsed Time

Mathematics

Common Core 3.MD.1

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.

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?

Elapsed Time Video

Jack ate his lunch in 12 minutes. He finished at 12:26 pm. What time did he begin eating?
• 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
Mrs. Taylor’s science class lasts for 50 minutes. If it starts at 10:10 am, what time will class be over?
• 11:00 am
• 12:00 pm
• 10:40 am
• 11:10 am
A frozen pizza takes 14 minutes to cook. Adam placed a pizza in the oven at 1:27 pm. What time should he take the pizza out of the oven?
• 1:41 pm
• 1:53 pm
• 1:38 pm
• 2:01 pm
Julia needs to read a book for 20 minutes. What time should she begin reading if she wants to finish at 4:15 pm?
• 4:00 pm
• 3:45 pm
• 3:55 pm
• 3:50 pm
References