Matching Numeric Expressions to Descriptions

Matching Numeric Expressions to Descriptions

Lesson Routines

Opening

Lesson Routines

In each lesson, you have the same routines.

  • Read through the list of routines.
  • Listen as your teacher explains what you will do during each routine.

Classroom Expectations

Opening

Classroom Expectations

These are our classroom expectations.

Discuss:

  • As I enter the classroom, I am expected to…
  • I am expected to submit exercises before…
  • To get the tablet and any additional materials, I am expected to…
  • To put away materials at the end of the lesson, I am expected to…
  • I am also expected to…

Qualities of Effective Presentations

Opening

Qualities of Effective Presentations

During Work Time, you often prepare a presentation.

Discuss:

  • How do you organize your work to clearly communicate your thinking about a problem?
  • What kinds of visuals are helpful?
  • How can you make sure you explain your strategies and reasoning well?

Here are ideas about how to prepare clear presentations:

  • Understand your own work.
  • Use visuals and gestures to help others know what you are talking about.
  • Say fewer words and choose them carefully.
  • Include diagrams and graphs, when appropriate.
  • Speak clearly and slowly.
  • Stay calm. Remember to breathe.
  • Listen carefully to comments and questions.
  • Pause to think about your response before speaking.

Model Partner Work

Opening

Model Partner Work

Watch your teacher demonstrate how to complete this task with a partner.

  • Take turns matching word cards to numerical expression cards.
  • Explain to your partner how you know the cards match. Challenge your partner to have clear and complete explanations.
  • Evaluate the expression on your own and then check that you agree with your partner.
  • Use any extra time to clarify and improve your work.


INTERACTIVE: Card Match

 

Math Mission

Work Time

Connect a numerical expression with its meaning in words.

Match Expressions and Words

Work Time

Match Expressions and Words

Work with your partner.

  • Take turns matching word cards to numerical expression cards.
  • Explain to your partner how you know the cards match. Challenge your partner to have clear and complete explanations.
  • Evaluate the expression on your own and then check that you agree with your partner.
  • Use any extra time to clarify and improve your work.

Hint:

  • What is the difference between an expression, such as 82 + 2 and an expression with similar quantities and operations, such as (2 + 8)2?
  • How do you know when parentheses are needed?
  • Why are brackets needed in the expression 2[( 7 + 8 ) − 2]?

INTERACTIVE: Card Match

Prepare a Presentation

Work Time

Focus on the meaning of numerical expressions.

  • Describe your strategies for matching the numerical expression cards to word cards.
  • Explain your reasoning and justification.
  • Identify any mistakes you made and what you learned from them.
  • Include any questions your partner asked about your explanation.

INTERACTIVE: Card Match

Challenge Problem

Create your own numerical expressions and matching word descriptions. In your expressions, use numbers with more than four digits, include fractional quantities, and use three different operations.

Make Connections

Performance Task

Ways of Thinking: Make Connections

Take notes about how your own thinking is similar to and different from your classmates' thinking.

  • Are there new ideas that you want to try out?

  • What critiques do you have about your classmates' ways of thinking?

As your classmates present, ask questions such as:

  • Why is the order of the words not always the same as the order in the numeric expression?
  • What words helped you identify that you needed parentheses?
  • Where did you include your strategy and explanation in your presentation?
  • Are there any visuals it would be helpful to add to your presentation?

Describe Expressions

Formative Assessment

Summary of the Math: Describe Expressions

Read and Discuss

  • Parentheses and brackets identify operations that should be performed before other operations.
  • Parentheses are used to group parts of an expression together when you want them to act as a single quantity.
  • You read 82 as "8 squared" which means "8 times 8."

Can you:

  • Write a numerical expression from its description in words?
  • Write in words a description of a numerical expression?
  • Explain why the expression and the words match?
  • Evaluate the numerical expression?

Reflect On Your Work

Work Time

Reflection On Your Work

Write a reflection about the ideas discussed in class today. Use the sentence starter below if you find it to be helpful.

Something I wonder about the meaning of expressions is…