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IM 6.3.5 Lesson: Comparing Speeds and Prices

Author:GeoGebra Classroom Activities, IM 6 – 8 Math

Is the value of this expression closer to , , or ?

Select all that apply
  • A
  • B
  • C
Check my answer (3)

Is the value of this expression closer to , , or ?

Select all that apply
  • A
  • B
  • C
Check my answer (3)

Is the value of this expression closer to , , or ?

Select all that apply
  • A
  • B
  • C
Check my answer (3)

Some students did treadmill workouts, each one running at a constant speed. Answer the questions about their workouts. Explain or show your reasoning.

  • Tyler ran 4,200 meters in 30 minutes.
  • Kiran ran 6,300 meters in hour.
  • Mai ran 6.3 kilometers in 45 minutes.
What is the same about the workouts done by Tyler and Kiran?

What is the same about the workouts done by Kiran and Mai?

What is the same about the workouts done by Mai and Tyler?

At what rate did each of them run?

How far did Mai run in her first 30 minutes on the treadmill?

Tyler and Kiran each started running at a constant speed at the same time. Tyler ran 4,200 meters in 30 minutes and Kiran ran 6,300 meters in hour. Eventually, Kiran ran 1 kilometer more than Tyler. How much time did it take for this to happen?

Four different stores posted ads about special sales on 15-oz cans of baked beans.

Which store is offering the best deal? Explain your reasoning.

The last store listed is also selling 28-oz cans of baked beans for $1.40 each. How does that price compare to the other prices?

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