Unit 4 - Lesson 1 - Grade 8: Illustrative Mathematics

What do you notice? What do you wonder?

The temperature was very cold. Then the temperature doubled. Then the temperature dropped by 10 degrees. Then the temperature increased by 40 degrees. The temperature is now 16 degrees. What was the starting temperature?

Lin ran twice as far as Diego. Diego ran 300 m farther than Jada. Jada ran 1/3 the distance that Noah ran. Noah ran 1200 m. How far did Lin run?

Write the solution to your puzzle.

Solve your partner's puzzle. Make sure to show your thinking.

With your partner, compare your solutions to each puzzle. Did they solve them the same way you did? Be prepared to share with the class which solution strategy you like best.

Andre and Elena are reading the same book over the summer. Andre says he has read 1/5 of the book. Elena says she has read 20 more pages than Andre. If Elena is on page 55, how many pages are in the book?

Lin has drawn a diagram to solve this question. Find her error.