Archive | Fractions

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 […]

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.

How to See Why the Divisibility Trick for 3 Works

There’s a nifty trick for finding out if 3 divides evenly into a number. This little proof shows why the trick works.

(Divisibility) Practice Makes Perfect

Practice problems for reducing fractions. Use divisibility tricks to reduce fractions.

Divisibility by 7: Is there really a trick?

There’s a weird and interesting trick for divisibility by 7. This blog tells you how to do it. Sit back and be amazed.

Divisibility by 4 — Principles & Trick

It is not hard to find out if 4 goes into a number evenly. Here is a trick that shows you how to find out very quickly.

Divisibility: Find out if 3 divides evenly into an integer

Learning the divisibility tricks speeds up mental math. How to know if 3 divides into a number evenly? This blog tells you how

“Fraction Sandwich” Practice Problems: Dividing a Fraction by a Fraction (without choking!)

Last week I sent out a blog that helps students divide a fraction by a fraction. The technique is called the “Fraction Sandwich.” To help students “get the hang” of this technique, here are 10 practice problems for dividing one fraction by another.

Dividing Fractions: from annoying to FUN!

Dividing fractions has always been an annoying process, with the need to re-copy the problem and use the reciprocal of the second fraction. Well, no more. With this student-friendly new approach, kids will start dividing fractions with fun, gusto, and accuracy. Check it out!