Here’s a short video on how to find the LCM. It uses a trick that I have not seen anywhere else, and the approach is quite fast. The information in this video dovetails with the info in this post. I hope that you find this video helpful.
Tag Archives: Math Tricks
This trick makes it easy to solve algebraic proportions. Try it and see!
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!
Here’s a great way to help students get two for the price of one.
First, they make connections between multiplication and a topic very dear to their hearts: money. That’s because the trick is for multiplying by 25, and in using this trick, you use the fact that four quarters make a dollar. Secondly, students who learn the trick gain even greater “number sense,” as they learn not just about multiplication, but also about divisibility, remainders, and the effect of remainders on the results of division. This trick is rich in concepts.
Is there any way to make it easier to divide one fraction by another fraction? Read the post and you’ll see that it is possible. Here is a great math trick that makes it easier to divide fractions. Read the post and then try the division trick. You’ll be glad that you did.
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.
Here’s a handy-dandy tip that makes it easier to find the GCF. It gives you an upper limit for the GCF, so you know when you can stop testing numbers and tell the world that you’ve found the GCF.
Believe it or not, THERE IS a quick way to multiply two numbers together when both numbers are “teen” numbers. In other words, you can do a problem like 14 x 18 fast and just in your head. Here’s how ….