Elapsed Time

Why is adding or subtracting time like regular numbers (e.g., 2:48 + 4:31 = 6:79) an incorrect method for calculating elapsed time?

• Time does not follow the rules of place value.

• Time has specific units of measurement.

• It can lead to incorrect results like 6:79.

• All of the above.

Mahra's class bus ride started at 8:07 am and ended at 8:15 am. How long was the bus ride?

• 7 minutes

• 8 minutes

• 9 minutes

• 10 minutes

Are you enjoying the video lesson?

• Yes

• No

The dolphin show started at 8:24 am and finished at 8:41 am. What was the total duration of the show?

• 15 minutes

• 16 minutes

• 17 minutes

• 18 minutes

The class spent time petting sting rays from 8:57 am to 9:11 am. How much time did they spend petting sting rays?

• 12 minutes

• 13 minutes

• 14 minutes

• 15 minutes