Lesson 4

Zoo Sticker Arrays

Est. Class Sessions: 2

Developing the Lesson

Part 2: Solve Multistep Problems

Discuss Question 4 on the Zoo Stickers pages and create additional problems for students to solve using the display of the pages.

Ask questions such as:

X
  • Who has the most stickers? (Jacob)
  • How many more stickers does Jacob have than Michael? (one sticker)
  • What do you have to know before you could solve that problem? (Possible response: I have to know how many stickers Jacob and Michael bought. I know that Michael had 24 stickers because I added the rows of stickers: 6 + 6 + 6 + 6 = 24 and Jacob had 25 stickers:
    5 + 5 + 5 + 5 + 5 = 25. Jacob’s stickers minus Michael’s stickers: 25 − 24 = 1 sticker.)
  • How many stickers do the children have altogether? (24 + 25 + 20 = 69 stickers)
  • What is the first step you have to solve? (Possible response: I have to know how many stickers each child bought. I found how many each child bought by using repeated addition. Then I added the totals for each child.)
  • What strategy did you use to find the answer? (Possible response: I added 20 + 20 + 20 = 60 and
    4 + 5 = 9. Then I added 60 + 9 = 69 stickers.)
  • Does your answer make sense? (Possible response: Yes, I thought of money: 3 quarters equals 75¢. If I add 24 + 25 + 20, my answer should be close to 75.)

Explain that some problems may have more than one step to find the solution. Ask students to recall strategies for knowing how to solve one-step word problems. In Unit 1 students developed a chart of strategies for knowing a problem [MPE1]. Record student ideas for knowing the problem for multistep problems. See Figure 3 for a sample list of strategies.

Ask student pairs to work on the Cost of Zoo Stickers pages in the Student Activity Book. Have students refer to the Math Practices page in the Student Activity Book Reference section as they solve the problems. For Questions 1–3, intermediate questions are given to help students understand what they need to solve before they answer the question in the problem. Question 4 does not have any intermediate question. Students have to figure out what they need to solve before they answer the question.

Monitor students as they work on the problems.

If some students experience difficulty solving the problems, ask questions such as the following:

X
  • What is the question asking you to find?
  • What numbers do you need to solve the problem?
  • What do you need to know to answer the question?
  • What strategy can you choose to solve the problem?
  • Does your answer make sense? Does it answer the question?
  • Can the Strategies for Knowing the Problem
    chart help?
Adventure Book:
Student Activity Book: 617 618
Answers
X
SAB_Mini
+
X
SAB_Mini
+
Master:
A sample list of student strategies for knowing the problem
X
+