Lesson 10 Concepts of Division

    • Let’s think about the size of quotients.

Warm-up Number Talk: Same Dividend, Different Divisor

Find the value of each expression mentally.

Activity 1 Share Pretzels

Picture

Order the situations from greatest to least based on the number of pretzels each student will get. Be prepared to explain your reasoning.

  1. 3 students equally share 42 pretzels.

  2. 14 students equally share 42 pretzels.

  3. 3 students equally share 24 pretzels.

  4. 3 students equally share 45 pretzels.

  5. 7 students equally share 42 pretzels.

  6. 3 students equally share 6 pretzels.

  7. 6 students equally share 42 pretzels.

Activity 2 Division Patterns

Problem 1

Find the value of each expression.

Problem 2

  1. What patterns do you notice?

  2. Why is the quotient getting smaller?

  3. What do you know about this expression: ?

  4. Draw a diagram to represent .

Practice Problem

Problem 1

For each pair of expressions, decide which is greater. Explain your choice without calculating the value of the expressions.