How to tell if a Number is Divisible by 8

How to tell if 8 divides into a number. There is a simple test for this. This post explains this.

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.

Multiplication Trick — Multiplying by 5

Quick easy trick for multiplying even numbers by 5.

Times Tables, Learning the Threes

Learning times tables can seem like drudgery. But here’s a fun, rhythmic game approach to learning the threes. Try it and see if you don’t have success.

Multiplication Trick: x 25

How to quickly multiply by 25. This is a fun math trick that anyone can learn in 5 minutes or less.

“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.

Multiplication Trick #5 — Multiply Two-Digit Numbers by 11

There’s a quick and easy trick for multiplying two-digit numbers by 11. Dazzle your friends, amaze your family, begin your career in show-biz … o.k., maybe not show-biz, but still this is a pretty cool trick. Check it out!