📊Math G3 L7.3 🤔Explore B - Elapsed Time on a Number Line

Part 1

voice explanation

What is the start time?

• The start time is 6:15

What is the elapsed time?

• We don't know

What is the end time?

• End time is 10:30 for the parade and fireworks
• End time for games is 9:00

Are these times a.m. or p.m.?

• These times are p.m.  The start time is dinner and the fireworks happen after dark.

Let's solve using a number line.

Begin with the start time and the end time.

6:15 and 10:30.

We will make jumps of 1 hour first.

What is 1 hour from 6:15?

• 7:15

What is 1 hour from 7:15?

• 8:15

What is 1 hour from 8:15?

• 9:15

What is 1 hour from 9:15?

• 10:15

What is 1 hour from 10:15?

• 11:15--this is beyond our end time.

Now let's determine how far from 10:15 to 10:30.

• This is 15 minutes.

voice explanation

The total amount of time is 4 hours and 15 minutes.