Reflection: Developing a Conceptual Understanding Estimating Sums and Differences of Whole Numbers - Section 5: Closure

Using number lines is something that I don't do a lot.  However, after this lesson, I will incorporate them more into my lessons.  It really gives the students a visual of rounding.  Sometimes when we teach the rules of rounding some of the students do not have a clue about what we're talking about.  They can go through the steps, but it doesn't mean anything to them.  When they put it on a number line, they can see it.  This gives conceptual understanding of actually what rounding means.

Using Number Lines
Developing a Conceptual Understanding: Using Number Lines

Estimating Sums and Differences of Whole Numbers

Unit 11: Adding and Subtracting Whole Numbers
Lesson 2 of 11

Big Idea: If students do not need an exact answer, they will use place value to round numbers to find sums and differences.

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Standards:
Subject(s):
Math, Number Sense and Operations, rounding, estimation, Operations
60 minutes

Rose Monroe

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