# Section B: Practice Problems Relate Multiplication and Division

## Section Summary

Details

In this section, we learned how multiplication and division are related.

We used strategies to multiply and divide and worked towards fluent multiplication and division within 100.

## Problem 1 (Lesson 6)

There are 35 books on the bookcase. There are 7 books on each shelf. How many shelves are there? Explain how the equations and both represent the situation.

## Problem 2 (Lesson 7)

There are 24 eggs in the container. There are 6 in each row. How many rows of eggs are there?

Write an equation that represents the situation. Use a symbol for the unknown. Then, answer the question.

## Problem 3 (Lesson 8)

For each multiplication equation, write a related division fact you know from the multiplication equation.

## Problem 4 (Lesson 9)

Lin knows . Explain how she can use this fact to find .

## Problem 5 (Lesson 10)

1. Highlight parts of the diagram to show the expression .

2. Explain how you could use the diagram to calculate .

## Problem 6 (Lesson 11)

Mark or shade the rectangle to show a strategy for finding its area. Then, explain how to use the diagram to find the area.

## Problem 7 (Exploration)

Noah finds by calculating .

1. Make a drawing showing why Noah’s calculation works.

2. Use Noah’s method to calculate .