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134 results
estimating and rounding offClear All
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Lesson Plan
Curated OER

How Much Is On The Floor?

For Teachers K - 2nd
Learners estimate the number of items in a group. In this estimation lesson, students are presented with random objects to clean up. Learners estimate how many items are present and then compare the actual number of items to their...
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Worksheet
Curated OER

High School Mathematics Problems from Alaska: Cigarette Smoking

For Teachers 9th - 12th
Students analyze the monetary cost associated with smoking. Students use statistics to determine life expectancy and cost associated with smoking.
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Lesson Plan
Curated OER

Our World A Complex Eco-system

For Teachers 6th
Sixth graders set up an ecosystem, investigate conservation techniques, develop an action plan for conservation, and various other activities to explore the ecosystem.
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Worksheet
Curated OER

Jobs and Salaries

For Students 9th - 12th
In this economics worksheet, students look for the budgets and go through the practical activities of maintaining a monthly expense sheet.
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Interactive
PBS

Pbs Learning Media: Rounding: Cyberchase Games

For Students K - 1st
In this interactive activity, discover how rounding off numbers helps you estimate faster.
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Unknown Type
Illustrative Mathematics

Illustrative Mathematics: 3.nbt, 4.nbt Rounding to the Nearest 100 and 1000

For Teachers 2nd - 4th Standards
This task builds off of the skill of rounding to the nearest ten and hundred in third grade. Aligns with CCSS.Math.Content.3.NBT.A.1 Use place value understanding to round whole numbers to the nearest 10 or 100.
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Handout
University of California

University of Calilfornia: Significant Figures Ii

For Students 9th - 10th
This site from the University of California provides a lengthy and intelligent discussion of sig figs, absolute and relative precision, accuracy, precision in calculations, rounding off, and the whole shooting match of how we report what...
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Website
Simon Fraser University

Chem1 Virtual Textbook: Significant Figures and Rounding Off

For Students 9th - 10th
As part of a larger site called "Getting started in Chemistry," this site examines significant figures and claims to teach the user "how to avoid telling lies with numbers."
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Unknown Type
BBC

Bb Ci: Review Significant Digits

For Students 9th - 10th Standards
BBCi presents a test prep review ("revision") section on significant digits and on approximating an answer by rounding in order to work with an easy number. Click on "Test Bite," on the last page to get an interactive quiz.
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Activity
Lawrence Hall of Science

The Math Page: Skill in Arithmetic: The Meaning of Multiplication: Mental Calculation

For Students 3rd - 8th Standards
If you are looking for a website that explains and defines the basics of mental multiplication with helpful hints then you have arrived at an excellent resource. There are even practice problems at the very end of the lesson.
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Unknown Type
Other

Tlsbooks.com: Printable Math Worksheets

For Students Pre-K - 1st
You may print off addition, subtraction, multiplication, division, averages, fraction, and other miscellaneous worksheets that are related to mathematics. On the left hand side of this page you will also find links to other subjects,...
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Unit Plan
CK-12 Foundation

Ck 12: Arithmetic: Product Estimation With Mixed Numbers/fractions

For Students 8th
[Free Registration/Login may be required to access all resource tools.] Estimate products and quotients of fractions and mixed numbers.
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Unit Plan
Lawrence Hall of Science

The Math Page: Skill in Arithmetic: The Meaning of Subtraction, and Mental Calculation

For Students Pre-K - 1st Standards
This website explains and defines basic subtraction. There are practice problems at the very end of this lesson.
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Activity
Lawrence Hall of Science

The Math Page: Skill in Arithmetic: Table of Contents

For Students 3rd - 8th Standards
This website from The Math Page explains some helpful hints about how to do mental math.