Lesson 33: estimating & Word Problems
Lesson 33 Learning Objectives:
Use rounding to estimate products, and use product estimates to determine the reasonableness of final answers
Solve word problems involving multiplication
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Reflect
Reflect in your math journal. Draw, create or write to share your thinking. See Lesson guide 33 for more reflection questions, real life anchoring ideas, playful explorations and creative invitations.
If I estimated 25 × 6 as 150, but my actual answer was 143, does that mean I was wrong?
You collect 47 apples from your tree each week for 6 weeks. Is 300 a reasonable estimate? Why or why not?
Why might you want to estimate a product before solving it exactly?
When you round a number to estimate a product, what do you lose and what do you gain? Does rounding make the numbers feel simpler, fuzzier, or friendlier?
How do you decide if an answer “makes sense” in real life? Is it about the size of the number, the story it’s connected to, or how it feels when you imagine it?
Math Talk:
What Math Lives Here?
Have a conversation about this image. Be curious. Be creative. Can you see in different ways?
What do you notice? What can you multiply? What could you estimate?
Image and design by LM
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