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Unit 3 - Lesson 18 - Grade 3: Illustrative Mathematics

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Grade 3 Unit 3
Lesson 18: Diagrams and Equations for Word Problems
CC BY 2021 Illustrative Mathematics®
Grade 3 Unit 3
Lesson 18: Diagrams and Equations for Word Problems
CC BY 2021 Illustrative Mathematics®
Lesson: Diagrams and Equations for Word Problems

Notice and Wonder: Diagrams (Warm Up)

1.

What do you notice?

2.

What do you wonder?

Card Sort: Situations, Equations, and Diagrams

Your teacher will give you a set of cards showing situations, equations, and diagrams.

Sort the cards into groups so that the cards in each group represent the same situation. Be ready to explain your reasoning.
3.

Explain your reasoning for sorting the cards.


Makes Sense to Me: A Gallery Walk

Your teacher will assign a problem to your group. Work together to solve your assigned problem.
4.

Create a poster of your group’s solution. Organize your work so that it can be followed by others.

As you visit other groups' posters, consider how each answer makes sense.
5.

Choose one poster and make a comment on the solution. Write how you know the answer makes sense.

Cool Down: Equation Match
6.

Andre had 451 beads. 125 beads were blue. 223 beads were pink. The rest of the beads were yellow. How many beads were yellow?

Which equation matches this situation?

7.

Explain your reasoning.