This assessment pair goes way beyond simple graphing, factoring and solving polynomial equations, really forcing learners to investigate the math ideas behind the calculations. Short and to-the-point questions build on one another,...

Take young scholars on a trip through history with this unit on the mathematics and architecture of the Mayan civilization. Starting with a introduction to their base twenty number system and the symbols they used, this eight-lesson unit...

It takes a lot of math to build an Igloo. Can you help Kirima? Students will learn to select and apply appropriate mental, written or calculator strategies to solve addition problems.

[Free Registration/Login may be required to access all resource tools.] Find sums and differences of decimals using mental math.

[Free Registration/Login may be required to access all resource tools.] Use mental math to divide by decimal powers of ten and find a quotient.

[Free Registration/Login may be required to access all resource tools.] Use mental math to multiply by decimal powers of ten.

[Free Registration/Login may be required to access all resource tools.] Use mental math to divide by whole number powers of ten.

[Free Registration/Login may be required to access all resource tools.] Evaluate numerical expressions using mental math.

[Free Registration/Login may be required to access all resource tools.] Solve for the unknown in a proportion using mental math.

[Free Registration/Login may be required to access all resource tools.] Use mental math to multiply by whole number powers of ten and find a product.

This website explains and defines basic subtraction. There are practice problems at the very end of this lesson.