Lesson 15 Let’s Compare

    • Let’s compare numbers.

Warm-up Choral Count: Plus 10

Count by 10, starting at 3.

What patterns do you see?

Activity 1 Which is More?

  • Each partner spins a spinner.

  • Each partner shows the number any way they choose.

  • Compare with your partner.

  • Which number is more?

Spinner A:

Spinner.

Spinner B:

Spinner. 

Activity 2 Elena and Noah Compare Numbers

  1. Elena says 75 is greater than 65 because 7 is greater than 6. 
    What do you think Elena means?
    How could Elena be more clear?

  2. Noah says 39 is greater than 41 because it has a 9 and 9 is the greatest number.
    Do you agree with Noah?
    What could you tell Noah to help him compare these numbers?

Activity 3 Centers: Choice Time

Choose a center.

Write Numbers

Center. Write Numbers.

Grab and Count

Center. Grab and Count.

Five in a Row

Center activity. Five in a row.

Practice Problem

Problem 1

  1. Which number is greater, 54 or 36?
    Show your thinking using drawings, numbers, or words.

  2. Which number is less, 25 or 52?
    Show your thinking using drawings, numbers, or words.