Curated OER
Investigate Factors Affecting Nitrates in Groundwater
Students participate in an experiment in which they investigate the factors affecting the levels of nitrates in groundwater. Using examples, they explain the nitrogen cycle and identify the sources of chemical nitrogen fertilizers. ...
Math Mammoth
Rounding
In this math worksheet, learners solve the problems that are based upon the skill of rounding. The answers are written into one of the 4 sets.
Science 4 Inquiry
The Last Supper: Identifying Macromolecules
Why do medical examiners always state the contents of a person's stomach? Scholars learn about the importance of macromolecules through a case study of stomach contents. They perform multiple tests to determine a conclusion before they...
Curated OER
Basics of Estimation
In this estimation pre-test worksheet, students answer ten multiple choice estimation word problems. This is an interactive pre-test.
Curated OER
Estimating Sums
In this estimating sums worksheet, students, working with a partner, practice problem solving five word problems involving estimation.
Curated OER
Estimating Before Multiplying
In this estimating before multiplying worksheet, students interactively answer 10 multiple choice questions about estimating, then click to check their answers.
Curated OER
Math Computation Review for Grade 5
In this math computation review for grade 5 worksheet, 5th graders answer 25 multiple choice mixed problems with the answer key included.
Curated OER
Count by Grouping Into Tens
In this counting by grouping learning exercise, students group shapes into tens by circling either groups of 5 or ten in ech. A reference website for additional resources is given.
Curated OER
Counting by Grouping Into Tens
In this counting worksheet, students group sets of objects by grouping them into sets of ten, circling as they count. Page 3 is a "teacher guide."
Texas Instruments
Texas Instruments: Estimating With Rational Numbers
In this activity, students will round fractions and mixed numbers, and then use their rounding skills to estimate sums, differences, products, and quotients.
Fact Monster
Fact Monster: Rounding Numbers
The lesson explores how to round numbers. Explanations and examples are included in the tutorial.
Scholastic
Scholastic: Study Jams! Math: Numbers: Estimate Whole Numbers
This site provides great practice on the concept of estimating and rounding whole numbers. Students can first learn about the topic by watching a step by step instruction video that also points out areas of concern. Finally, students can...
Khan Academy
Khan Academy: Round Whole Numbers
Practice rounding whole numbers to the nearest hundred or thousand. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
CK-12 Foundation
Ck 12: Arithmetic: Mixed Number and Fraction Estimation
[Free Registration/Login may be required to access all resource tools.] Round fractions and mixed numbers in order to estimate sums and differences.
CK-12 Foundation
Ck 12: Arithmetic: Mixed Number and Fraction Estimation
[Free Registration/Login may be required to access all resource tools.] Approximate fractions and mixed numbers by using common benchmarks
CK-12 Foundation
Ck 12: Arithmetic: Mixed Number Rounding to the Nearest Whole
[Free Registration/Login may be required to access all resource tools.] Round given mixed numbers to the nearest whole number.
CK-12 Foundation
Ck 12: Arithmetic: Estimation of Whole Number
[Free Registration/Login may be required to access all resource tools.] Round whole numbers in order to estimate sums and differences.
Khan Academy
Khan Academy: Round Whole Numbers Word Problems
Solve word problems by rounding whole numbers. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
CK-12 Foundation
Ck 12: Arithmetic: Estimation of Whole Number
[Free Registration/Login may be required to access all resource tools.] Round whole numbers in order to estimate sums and differences.
CK-12 Foundation
Ck 12: Arithmetic: Estimation of Whole Number
[Free Registration/Login may be required to access all resource tools.] Round and find compatible whole numbers in order to estimate products and quotients.
AAA Math
Aaa Math: Subtraction Using Estimation
This site explains how to estimate differences by rounding. Games and exercises are provided to practice the skill.
CK-12 Foundation
Ck 12: Arithmetic: Decimal Rounding to Estimate Sums and Differences
[Free Registration/Login may be required to access all resource tools.] Estimate sums and differences by rounding decimals to whole numbers.
AAA Math
Aaa Math: Round to Nearest Thousand
This site explains how to round whole numbers to the nearest thousand. Gives practice and games to master this skill.
AAA Math
Aaa Math: Round to Nearest Hundred Thousand
This site explains how to round whole numbers to the nearest hundred thousand. Gives practice and games to practice this skill which are fun and helpful on the subject.