Playing with numbers can create amazing, if sometimes dubious, results. Mathematics has resulted in technology and progress as we know it. So, it is a skill that everyone should learn.

In this day and age, everyone has a calculator, from your mobile for instance.

However, learning new mathematical tricks can be entertaining. It’s also a great way to impress your friends.

Here’s an easy way to multiply two-digit numbers up to 100.

Let’s put that brain to work. What is 21 multiplied by 31?

Of course, you got 651. You have a calculator! And if you didn’t use one and instead relied on the power in your head, congratulations!

Here’s tecmath with a cool trick for solving an equation without using a calculator.

Multiply the first two digits together. So that’s 2 multiplied by 3. That’s easy, it’s 6. Place a space after 6 and multiply the last two digits, which are 1 by 1. As a result, you should be looking at 6_1. Do you get it?

Take a look at how he gets the middle digit now.

You’ll need to multiply 1 by 2 and 1 by 3. Add the two answers, 2 and 3, to get a total of 5. This gives you 651.

Here’s one more.

He calculates 43 x 21 = ?

This time, there’s no shame in it. Whether you have a calculator or not, go ahead and see what you get. 903?

We take 4 out of 43 and 2 out of 21. As a result, 4 x 2 = 8. Another blank space follows, followed by 3 from 43 and 1 from 21, yielding 3 x 1 = 3.

It’s the same trick. 4 from 43 and 1 from 21, multiply it will give you 4. Then, 3 from 43 plus 2 from 21 is 3 x 2 = 6. You have a 4 and a 6. When you add them all up, you get a total of ten.

But you can’t put a 10 between 8 and 3.

Insert the zero between the numbers 8 and 3. As shown in his example, take 1 and add it to 8 to get 9.

There you have it, 903.

One of the viewers named Jim C is grateful.

“I’m 38 years old and not very good at math. I blame myself out of anyone for this. I’ve watched a few of your videos so far and have learned more in regards to math than the past 36 years of my education. You are making math fun for me. The only thing that is holding me back now is mental math and doing these in my head. I’m working on that though. Thank you!”

We should be as well!

A third example can be found on Tecmath.

I’m sure you’ve gotten the hang of it by now, but for the sake of learning, try this one.

It’s 42 multiplied by 63. It’s getting higher huh?

Take the answer and leave a space. Start with 4 x 6 = 24. Then 2 x 3 = 6, giving us 24_6.

We multiply in the pattern he showed us once more. 4 x 3 equals 12 and 2 x 6 equals 12. Add both together, so 12 + 12 = 24.

Place the 4 in the middle of 24 and 6, then add 2 and 4 to get 6. The correct answer is 2,646.

I understand what you’re thinking. Not everyone is good at math, even though we all have phones with calculators. But that’s the whole point. Why be ordinary when you can be extraordinary?

Here are three more examples that you can work on.

Invite your children or friends to try and solve these!

Did you know who’s the guy behind this trick?

It’s hosted by math enthusiast Josh.

“Visual learners may appreciate this YouTube channel that breaks down mathematics principles through digestible clips, examples, and animations.”

Tecmath guides viewers in learning geometry, trigonometry, statistics, and more!

Watch the video below for a cool math trick!

Please SHARE this with your friends and family!

Sources: YouTube – tecmath, AMSER