Month: March 2013

Solve Problems and Save the Trees with Grid Maths

Teaching Tools, Web 2.0 Technology

Whether you are working on fractions, long division, simultaneous equations,  the Singaporean model method, or matrices, Grithmaths.com can be a very helpful tool.  Grid Maths is an online electronic grid paper for solving mathematics problems. In the application, you can type into the grid, construct rectangles with different colors, and draw lines as well as ellipses. In addition, you can also construct several grids. Below are several examples of how it can be used in the classroom.

Lowest Common Multiple

Grid Maths Lowest Common Multiple

Checking for Prime Numbers  » Read more

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The Geometry of the Least Common Denominator

Elementary School Number Theory, High School Algebra, High School Mathematics

In mathematics, in putting together things, we must have a commonality; we must add objects that belong to the same set. We add 2 apples and 4 apples to get 6 apples. We do not add apples and oranges and come up with a single- kind-of-fruit-sum.

Apples

This is also true with numbers and measurements: we add, subtract, multiply or divide numbers that belong to the same set or measures with the same unit. We do not add binary numbers to decimal numbers and get a result without conversion.  We must either convert binary numbers to decimal, or vice versa and then perform addition or any other operations. Also, in finding the area of a rectangle with length 10 inches and width 5 centimeters, the answer must either be in square inches or in square centimeters. » Read more

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