Lesson 19 Ways to Divide Larger Numbers

    • Let’s make sense of representations of division.

Warm-up True or False: Ones, Tens, Twenties

Decide if each statement is true or false. Be prepared to explain your reasoning.

Activity 1 Divide with Base-Ten Blocks

Problem 1

Use base-ten blocks to represent each expression. Then, find its value.

Problem 2

Base ten blocks.

Find the value of each expression. Use base-ten blocks if you find them helpful.

Activity 2 Different Ways to Show Division

Problem 1

Jada and Han used base-ten blocks to represent .

Here is Jada’s work:

Base ten diagram. 6 tens with arrow pointing to 5 groups of 1 ten and 2 ones.

Here’s Han’s work:

Base ten diagram. 6 tens with arrow pointing to 6 sets of 2 groups of 5 blocks.

Make sense of Jada’s and Han’s work.

  1. What did they do differently?

  2. Where do we see the value of in each person’s work?

Problem 2

How would you use base-ten blocks so you could represent these expressions and find their value? Be prepared to explain your reasoning.

  1. : Would you make 4 groups or groups of 4?

  2. : Would you make 6 groups or groups of 6?

  3. : Would you make 15 groups or groups of 15?

Practice Problem

Problem 1

  1. Find the value of . Use base-ten blocks if they are helpful.

  2. Find the value of . Use base-ten blocks if they are helpful.