Estimating with Decimals


Estimating with Decimals helps students learn how to estimate numbers with decimal values. Students will use a place values chart and follow four steps for estimating to solve decimal problems. By the end of the lesson, they will easily be able to round decimal numbers to any place value.

There are a few suggestions listed in the “Options for Lesson” section on the classroom procedure page. One such option is to have students write their own decimal rap to remember the rules for estimating. Another idea is to make a video that explains those rules that incorporates real-world examples. To help students who are struggling with this concept, you could also allow them to use a place value chart to guide them along.

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What our Estimating with Decimals lesson plan includes

Lesson Objectives and Overview: Estimating with Decimals teaches students how to estimate numbers that involve decimals. Students will learn the steps to follow. By the end of the lesson, they will easily be able to estimate decimals to any place value.

The lesson has two content pages. The first explains to students what estimate means and how it is a helpful skill. There is a place value chart on this page to review. The students will then learn the steps to use to estimate, which are similar to the steps for estimating whole numbers.

The second page lists a few examples to help students practice. You may choose to add more examples if your students need a little extra help. The worksheets will also assist them in solidifying what they learned.


For the activity, students will get to “race” to estimate. You will assign students to groups of four or five kids depending on the size of your class. You will need to prep by having four or five “lanes” of decimals on the board or a large piece of paper. Each lane should have about five different decimals and the place value that the number needs to be rounded to. Make sure you mix up the numbers order or use different numbers for lanes that are next to each other so kids can’t copy each other.

Then have students line up in the order they want to “run” and tell them when to go. Students will run to the decimal they have to round up or down. Once they have the right answer, the next students can run to the next problem. The first team done with all the decimals wins the race.


The practice worksheet divides questions into three sections. The first section requires students to round decimals to the place value that is underlined. There are four questions here. For the second section, students will round numbers to the place value that is next to the number, such as tenths or thousandths. There are four questions here as well. The third section requires students to round one number to four different places.


For the homework assignment, students will round 10 numbers to the place value that is underlined. Then they will pick one problem from the list and explain the steps they used to get to that number.

Additional information


4th Grade, 5th Grade



State Educational Standards

LB.Math.Content.4.NBT.A.3 LB.Math.Content.5.NBT.A.4

Lessons are aligned to meet the education objectives and goals of most states. For more information on your state objectives, contact your local Board of Education or Department of Education in your state.