Lesson 9: Practice Problems

Problem 1

Solve each equation.

Problem 2

Here is an equation . Write three different equations that have the same solution as . Show or explain how you found them.

Problem 3 From Unit 3 Lesson 3

Select all the equations that match the diagram.

A tape diagram labeled 18 with 3 segments each labeled "x+5"

Problem 4 From Unit 3 Lesson 2

There are 88 seats in a theater. The seating in the theater is split into 4 identical sections. Each section has 14 red seats and some blue seats.

  1. Draw a tape diagram to represent the situation.

  2. What unknown amounts can be found by by using the diagram or reasoning about the situation?

Problem 5 From Unit 3 Lesson 4

Match each story to an equation.

  1. A stack of nested paper cups is 8 inches tall. The first cup is 4 inches tall and each of the rest of the cups in the stack adds inch to the height of the stack.

  2. A baker uses 4 cups of flour. She uses cup to flour the counters and the rest to make 8 identical muffins.

  3. Elena has an 8-foot piece of ribbon. She cuts off a piece that is of a foot long and cuts the remainder into four pieces of equal length.