Estimate the product by rounding to the nearest ten before multiplying.

[Free Registration/Login may be required to access all resource tools.] Round whole numbers in order to estimate sums and differences.

In this video segment from Cyberchase, Inez estimates whether she has enough jelly beans in her large container to decorate all of the cookies in her batch.

[Free Registration/Login Required] The teacher will use this lesson plan flipchart to review estimation.

[Free Registration/Login may be required to access all resource tools.] In this lesson students use leading digits to estimate decimal products and quotients. Students examine guided notes, review guided practice, watch instructional...

At its core, the LEGO MINDSTORMS product provides a programmable microprocessor. Students use the EV3 processor to simulate an experiment involving thousands of uniformly random points placed within a unit square. Using the underlying...

Students learn about trigonometry, geometry and measurements while participating in a hands-on interaction with LEGO MINDSTORMS NXT technology. First they review fundamental geometrical and trigonometric concepts. Then, they estimate the...

A fact sheet listing the numbers of military service members, deaths, and woundings in each war America has been involved in since the American Revolution. It also gives names of the last survivors of earlier wars, estimates of living...

Students use conductivity meters to measure various salt and water solutions, as indicated by the number of LEDs (light emitting diodes) that illuminate on the meter. Students create calibration curves using known amounts of table salt...

Students practice their multiplication skills using robots with wheels built from LEGO MINDSTORMS NXT kits. They brainstorm distance travelled by the robots without physically measuring distance and then apply their math skills to...

Students use three tracks marked on the floor, one in yards, one in feet and one in inches. As they start and stop a robot specific distances on a "runway," they can easily determine the equivalent measurements in other units by looking...

This site presents the budgeting process through a series of steps. This first page describes the first step, creating a spending plan of estimated expenses. This page also has a link to a downloadable spending plan that requires Acrobat...

The USA unemployment rate jumped to a 26-year high in August 2009 even though the jobless rate improved. These rates are based on a survey of households while the payroll estimate comes from a survey of employers. This may explain why...

Franklin works with Laverne to create a budget for a job painting a room, in this video segment from TV 411.

Use Glencoe's randomly generated self-checking quiz to test your knowledge of estimating sums and differences. Each question has a "Hint" link to help. Choose the correct answer for each problem. At the bottom of the page click the...

Hurricane Katrina hit New Orleans on August 29, 2005. Report discusses the devastation, the mandatory evacuation of New Orleans, and damage estimates.

What angles can you see in these photos of Olympic sports? Can you estimate them? This challenging activity is aimed at older primary pupils at Key Stage 2.

This problem introduces Carbon 14 dating which is used by scientists to date certain organic material. This version is based on the ratio of Carbon 14 to Carbon 12, which decreases at a constant exponential rate after an organism dies....

Does he have a chance? In this math challenge, estimate Helix's chances of winning the bowling tournament.

[Free Registration/Login may be required to access all resource tools.] Add and subtract decimals with and without rounding

"Imagine a baseball dropped from an airplane flying at 30,000 feet; imagine that baseball reaching speeds of 120 MPH as it falls to the ground; and imagine you're under it!" How does hail form? How big can it get? Read more here about...

In this sixth-grade lesson, students estimate the weight of their backpacks and construct scatter plots of actual versus estimated weights.

Census population estimates for 2009 indicate that North Carolina continues to be one of the fastest-growing US states. Between the 2000 Census and July 1, 2009, the state's population grew by 16.5%, compared with the US growth rate of...

The handout has students estimate the slope of a given line. The math graph is available in PDF format.