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 […]

# Archive | Multiplication

# 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.

# 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.

# Abbreviating the Order of Operations

The PEMDAS abbreviation for the order of operations misleads students into thinking they should always multiply before dividing, and always add before subtracting.

# 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.

# 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!

# NOVEMBER PROBLEM OF THE MONTH

November 2008 Problem of the Month: finding an alternative way to represent a number using nothing more than a few candles. Use number theory and flexible thinking to find a way to show the number. There’s a prize for the person who answers most quickly.

# Multiplication Trick #2 — Multiply by 15 FAST!

Here’s a great trick that helps you quickly multiply by 15. It’s handy for many real life situations, such as when you need to calculate a 15% tip at a restaurant. It involves nothing more than simple math. Try it, and then watch as your friends and family gaze in amazement.

# Memorizing those Times Tables

Yes, there IS a way to help students master the times tables of multiplication facts. This article tells you how you can do it in a fun and playful way.