Calculating Elapsed Time with Mountains, Hills, and Rocks

Sarah from Geeky Tici introduces a strategy for calculating elapsed time using a method called 'Mountains, Hills, and Rocks.' She demonstrates this with a word problem involving a student's school day. The strategy involves using a number line and adding 'mountains' for hours, 'hills' for ten minutes, and 'rocks' for one minute to calculate the total time. The video concludes with the total elapsed time being calculated as 5 hours and 43 minutes.

What does a mountain represent in the elapsed time strategy?

• 1 minute

• 10 minutes

• 1 hour

• 30 minutes

Tags

CCSS.3.MD.A.1

What time did Christy arrive at school?

• 1:28 PM

• 8:00 AM

• 12:08 PM

• 7:45 AM

Tags

CCSS.3.MD.A.1

What was the end time of Christy's school day due to her dentist appointment?

• 3:00 PM

• 1:28 PM

• 2:45 PM

• 12:08 PM

Tags

CCSS.3.MD.A.1

How many hours are represented by the mountains used to calculate Christy's time at school?

• 5 hours

• 4 hours

• 3 hours

• 6 hours

Tags

CCSS.1.MD.B.3

Why can't another mountain be added after reaching 12:45?

• There's a limit to mountains

• It would exceed the end time

• Mountains are only used in the morning

• It would not be accurate

Tags

CCSS.5.G.A.2

What does a hill represent in this time calculation strategy?

• 15 minutes

• 30 minutes

• 1 hour

• 10 minutes

Tags

CCSS.3.MD.A.1

How many hills were added to get closer to the end time?

• 4 hills

• 3 hills

• 2 hills

• 5 hills

Tags

CCSS.3.MD.A.1

What mistake is made when adding 10 minutes to 12:55?

• It skips to 1:15

• It should be 1:05

• None, it's correct

• It becomes 12:65

Tags

CCSS.3.MD.A.1

How many minutes are represented by the rocks used in the final calculation?

• 10 minutes

• 5 minutes

• 3 minutes

• 2 minutes

Tags

CCSS.4.MD.A.2

What is the total elapsed time Christy spent at school?

• 5 hours

• 4 hours and 45 minutes

• 5 hours and 43 minutes

• 6 hours

Tags

CCSS.3.MD.A.1