Exploring Elapsed Time with Z-charts

Sara from Geeky Tici introduces an elapsed time strategy called the Z chart. She sets up a word problem involving Christy's school hours and demonstrates how to calculate the elapsed time using the Z chart. The process involves adding minutes to reach the next hour, counting full hours, and adding remaining minutes to find the total time Christy spent at school.

What is the primary strategy being taught in the video?

• Basic algebra

• Geometric shapes identification

• Multiplication tables

• Z chart for elapsed time

Tags

CCSS.4.MD.A.2

What time did Christy arrive at school?

• 8:00 AM

• 7:45 AM

• 1:28 PM

• 12:00 PM

Tags

CCSS.3.MD.A.1

How many minutes are added to reach the next hour from the start time?

• 15 minutes

• 30 minutes

• 45 minutes

• 60 minutes

Tags

CCSS.4.MD.A.1

How many hours are counted from 8 o'clock to reach close to the end time?

• 5 hours

• 4 hours

• 3 hours

• 6 hours

Tags

CCSS.3.MD.A.1

What is the final step to complete the Z chart?

• Subtract 28 minutes

• Subtract 15 minutes

• Add 28 minutes

• Add 15 minutes

Tags

CCSS.3.MD.A.1

What are the parallel lines of the Z chart used to represent?

• Minutes

• Hours

• Days

• Seconds

Tags

CCSS.1.MD.B.3

How long was Christy in school on that day?

• 5 hours and 15 minutes

• 6 hours

• 4 hours and 43 minutes

• 5 hours and 43 minutes

Tags

CCSS.3.MD.A.1

What does the diagonal cross piece of the Z chart represent?

• Hours

• Minutes

• Days

• Seconds