Explaining Thinking - Section 2: You are the Teacher

  Explaining Thinking
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Estimation as a Strategy for Checking Work

Unit 18: Strategies That Work
Lesson 3 of 16

Objective: SWBAT use ballpark estimates to check the work of an imaginary student

Big Idea: Estimation can tell us if we are close in our answers to math problems. If we take the time to use it, we can see if our answer is in the right ballpark.

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Math, Number Sense and Operations, Operations , addition, subtraction, estimation, review
  40 minutes
screen shot 2014 06 01 at 10 44 31 pm
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