Curated OER
Estimation with Decimals
Estimation is a good way to build and assess a student's number sense. Watch as Sal uses estimation to solve a problem where he must determine how much 'Janelle' ran during a 4-day period. He calculates the exact amount and compares the...
Curated OER
How Do You Estimate a Quotient Using Compatible Numbers?
Learn how to do approximations to find a quotient. Given some large numbers to divide, how can this problem be tackled? It's often a good idea to do an approximation first as this can help to be in the ballpark in finding the solution....
Curated OER
Estimating Surface Area
Kids might enjoy this dramatic presentation on estimating surface area. The fake Transylvanian accent is a bit distracting but the problem solving practices are sound. Dr. Crazy Pants rounds his decimal measurements then multiplies...