MJ

__**chapter 3** **lesson 4**__ Estamating sums and differences!

In this lesson, you will learn how to estamaite decimals. **How to round decimals** 72.50 =  70                                          +68.50 =+70

oh.msmath1.net *has self check quiz,personal tutors and more* www.harcourtschool.com/glossary/math_advantage/glossary3.html
 * Websites.....**

**A picture of estamating decimals** http://www.leslienettling.com/6thNewsletters/DecimalDivideAnswerMathCom.gif

**What is a decimal?**

A decimal is a # with a decimal point to show tenths, hundereths , and so on

About how much more is 21.50 than 14.98 **Hint**-round each # to nearest dollar and subtract.
 * Example problem....**

**Mini Lesson** __This lesson is about decimals,and how you round them. You will learn how to round decimals too. You can estimate by rounding each decimal to the nearest whole # that is easy for yo to add and subtract. You also estimate by using front end estimation. You can do this by first adding or subtracting front digits,then do the same with the next digits. You can sometimes cluster data,that is called clustering. you can do this by rounding a group of close #'s to the same number.__
 * check out this cool vido**

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