Unit 7 - Lesson 12 - Grade 8: Illustrative Mathematics

By Formative Library

Last updated 2 months ago

13 Questions

Note from the author:

Grade 8 Unit 7
Lesson 12: Applications of Arithmetic with Powers of 10
CC BY 2021 Illustrative Mathematics®

Instructions

Grade 8 Unit 7
Lesson 12: Applications of Arithmetic with Powers of 10
CC BY 2021 Illustrative Mathematics®

Lesson: Applications of Arithmetic with Powers of 10

What Information Do You Need? (Warm Up)

What information would you need to answer these questions?

How many meter sticks does it take to equal the mass of the Moon?

If all of these meter sticks were lined up end to end, would they reach the Moon?

Meter Sticks to the Moon

How many meter sticks does it take to equal the mass of the Moon? Explain or show your reasoning.

Label the number line and plot your answer for the number of meter sticks.

If you took all the meter sticks from the last question and lined them up end to end, will they reach the Moon? Will they reach beyond the Moon? If yes, how many times farther will the reach? Explain your reasoning.

One light year is approximately 1016 meters. How many light years away would the meter sticks reach? Label the number line and plot your answer.

That’s a Tall Stack of Cash (Optional)

In 2016, the Burj Khalifa was the tallest building in the world. It was very expensive to build.

Consider the question: Which is taller, the Burj Khalifa or a stack of the money it cost to build the Burj Khalifa?

What information would you need to be able to solve the problem?

Record the information your teacher shares with the class.

Answer the question “Which is taller, the Burj Khalifa or a stack of the money it cost to build the Burj Khalifa?” and explain or show your reasoning.

10.

Decide what power of 10 to use to label the rightmost tick mark of the number line, and plot the height of the stack of money and the height of the Burj Khalifa.

11.

Which has more mass, the Burj Khalifa or the mass of the pennies it cost to build the Burj Khalifa? What information do you need to answer this?

12.

Decide what power of 10 to use to label the rightmost tick mark of the number line, and plot the mass of the Burj Khalifa and the mass of the pennies it cost to build the Burj Khalifa.

Cool Down: Reflecting on Using Powers of 10

Reflecting on Using Powers of 10

13.

What is a mistake you would expect to see others make when doing problems like the ones in this lesson? Give an example of what such a mistake looks like.