Lesson: Round Decimals to the Nearest Hundredth

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Lesson Objective

SWBAT round decimals to the nearest hundredth.

Lesson Plan

Teacher:

Subject:                                                                           

Kurt Sarsfield

5th Grade Math Problem Solving

Date: February 25, 2010

Lesson

5.4—Round Decimals to the Nearest Hundredth

SWBAT

SWBAT round decimals to the nearest hundredth (include applied problems).

Vocabulary:

Tenth, hundredth, thousandth—REVIEW

Rounding--REVIEW

Introduction to Lesson/Hook: 

Use flashcards to quiz students on which point on the number line is closer to two given numbers.

 

Examples

Round the decimals to the nearest given place value using the procedure.

A, b, and c.

 

 

First, let’s use the number line to round this to the nearest one. 

What are the increments listed on the number line?

What number would be halfway between 15 and 16?

What number would be halfway between 16 and 17?

What would this mark symbolize?

Where would I plot the decimal 16.8?

Is this decimal closer to 16 or 17?

 

We can also use the same rounding chant from earlier in the year. 

A volunteer to read the chant.

What digit are we rounding to?

Underline it. 

What is the next step?

Is the number more than 4?

What do I need to do?

Does this answer match my prediction using the number line?

 

Last we are going to round 0.397 to the nearest hundredth.

Use the number line.

Which two numbers is 0.397 between?

Which do you think it is closer to?

Why do you predict this?

Which digit is in the hundredths place?

Go next door. 

Is it more than 4?

What do we need to do to the underlined digit?

 

 

 

Differentiation:

 

I will be prepared to focus less on the why with the lower classes.  I imagine that they will struggle with the how. 

 

Closure: 

 

Before collecting the exit ticket, review the final question to go over the box on the right.

 

Lesson Resources

5.4 Round decimals to the nearest hundredth 5Math ProbSolv Sarsfield 2010.02.25v2 BL.doc  
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