Self Check

Self Check

Critique

Opening

Critique

Review your work on the Self Check problem and think about these questions.

  • How can you check whether your answer to each part of the problem is reasonable?
  • What methods do you know for dividing with fractions? How can you use these methods to divide with mixed numbers?
  • When you multiply or divide by a decimal, how can you figure out where to put the decimal point in the answer?

Math Mission

Opening

Apply your knowledge of fraction and decimal operations to solve a real-world problem.

Revise Your Work

Work Time

Revise Your Work

Work with your partner. Revise your work on the Self Check based on the questions from the Opening and feedback from your partner.

Jan makes and sells beanbag animals. Her most popular animal is her beanbag elephant.

  • For each elephant, she uses 13 yard of gray fabric, 134 pounds of dried beans, and a pair of plastic eyes.
  • Fabric costs $3 per yard, beans cost $1 per pound, and plastic eyes cost $0.89 per pair.
  • She sells each elephant for $17.20.

Show all of your work.

  1. Jan has 423 yards of gray fabric. How many elephants can she make?
  2. Jan has 28 pounds of dried beans. Does she have enough beans to stuff all of the elephants that she made with the fabric?
  3. Jan spends $22.25 on plastic eyes. How many pairs did she buy? Is this enough for all of the elephants she stuffed?
  4. After subtracting the cost of the materials that she used to make the elephants, how much money will Jan earn if she sells all of the elephants?

If you get confused about what operation to use, think about a simpler version of the problem in which all the numbers are whole numbers.

Prepare a Presentation

Work Time

Prepare a Presentation

Explain how you revised your Self Check problem. What did you do differently today compared to yesterday?

Challenge Problem

  • Write a word problem with decimals that requires using two different operations to solve.

  • What types of real-world situations involve decimals?

  • What types of real-world problems would require two operations to solve?

Make Connections

Performance Task

Ways of Thinking: Make Connections

Take notes on your classmates' approaches and solutions to the problem.

As your classmates present, ask questions such as:

  • What information is known?
  • What information are you trying to find?
  • Can you explain how you organized your work?
  • What strategy did you use to solve the problem?
    How did using that strategy to help you?
  • How did you decide what operation to use in that part of the problem?
  • How does your model represent the problem situation?

Reflect On Your Work

Work Time

Reflection

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

Something I learned about fraction division that really helps me solve problems is …