Archive | Elementary Math

The category for all things about Elementary Math.

GCF of 2 Numbers, Trick Finds it Fast

Ever need to find the GCF of two numbers? Here’s a trick for finding the GCF of any two numbers — very quickly. This is an original trick, so I doubt you’ll find it anywhere else online. But most important, it’s easy to use, and it works no matter how large the numbers might be. Also nice … learning this […]

PSAT Math Test, Day of Reckoning … ?

It has finally happened … students have taken the new PSAT. I know because Singing Turtle Tutoring (the tutoring company that my wife and I run) prepares students for this test, and over the last two weeks I’ve been helping many get ready for the new PSAT’s  math section. My big word of advice for many students:  learn […]

Journey to the LCM … and Beyond!

In this blog/video I want to take you a little bit deeper into the world of … the LCM! Yes, that fascinating little mathematical entity is beckoning us to explore it further. Several readers wrote to me after I posted my LCM “trick,” saying they want to see me demonstrate WHY this “shortcut” works. One […]

Problem of the Month – January 2013

Twelve is the first number with two pairs of factors (2 x 6 and 3 x 4). Primes, on the other hand, have no pairs of factors other than the trivial pair of one and the prime number itself. Considering that contrast, here’s an interesting fact about primes and the number 12. Add 12 to […]

The “Ladder of Primes”

Prime numbers help us reduce fractions Using the “Ladder of Primes,” students can more easily and more quickly reduce fractions to lowest terms.

Quick Easy Way to Untangle Confusion re: “Greater” and “Less”

Once students learn about negative numbers and absolute value, the concept of greater and less becomes a bit “cloudy.” What was once clear is now “muddied.” But there is an easy way for students to tell which of two numbers is greater and which is less. That method involves looking at the numbers on the […]

Secrets of the Calculator, Part 1

Calculators can be great assistants when doing math. Unfortunately many students are unaware of the capability of many calculator keys. This is the first in an occasional series of posts that will help students learn how to make better use of the calculator.

How to Decrease Mistakes in Algebra – Part 3

The double-slash helps students for a variety of reasons. This post explains some of the reasons why it works.

“Math Cafe” Gives Students Options for Math Success

Students like to order off of menus when they are in math class. That means that they like to learn a variety of approaches and then choose the method that works best for them. This post shows teachers how they can teach the same skill in a variety of ways and thereby give students more […]

New Approaches to Help Students Overcome Math Struggles

The teaching technique of finding out and helping students learn the “baby steps” that make up the larger math processes is having success through an organization called “Jump Math.” Read about it on this post.