Math Forum - Problems Library - Pre-Algebra, Operations with Numbers: Estimation

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 operations with numbers
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Basic ideas of estimation and rounding are explored in this section. Mental computaton and estimation are useful in moving from one representation to another. While rounding (of both rational and irrational numbers) is the underlying theme, students can be challenged to compare estimates, to decide on the degree of accuracy, and to make predictions.

Related Resources
Interactive resources from our Math Tools project:
   Math 7: Operations with Numbers: Rounding
   Math 7: Operations with Numbers: Estimation
The closest match in our Ask Dr. Math archives:
   FAQ: Rounding Numbers
NCTM Standards:
   Number and Operations Standard for Grades 6-8

Access to these problems requires a Membership.

Accuracy Please - Judy Ann Brown
Pre-Algebra, difficulty level 3. Considering precision, accuracy, and appropriateness in finding the volume of a cone. ... more>>

Baseball Attendance Figures - Judy Ann Brown
Pre-Algebra, difficulty level 3. Find the difference between the greatest possible number of people at the stadium and the least possible number of paid admissions to the game. ... more>>

Building a Snow Statue - Judy Ann Brown
Pre-Algebra, difficulty level 3. Determine the height of a snow statue using the given information. ... more>>

Do you listen to WMTH or WALG? - Judy Ann Brown
Pre-Algebra, difficulty level 4. Each week listeners switch radio stations. Predict the long-term distribution of listeners for each station. ... more>>

January Sales - Judy Ann Brown
Pre-Algebra, difficulty level 2. Mathematicians, put away your calculators and help Lynne estimate the cost of a set of golf clubs. ... more>>

Rounding Mountains - Judy Ann Brown
Math Fundamentals, difficulty level 2. Use estimated figures to determine the maximum and minimum differences between the heights of two mountains. ... more>>

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