back to top

This Weird Math Trick Will Make Addition Easier

No more counting on your fingers!

Posted on

But before we can solve 2+2, let's take a look at 4+4, because that's just twice as much, right? As you'll learn, it's easier to think of numbers in terms of 4ths rather than 2nds.

Advertisement

So, we all know from elementary school math that 2+2=4 and 4+4=8. But did you know that there's an even simpler way to do this kind of addition, using each number's shape as a guide?

Advertisement

So, to add 4 and 4 in a standard equation, assuming you don't know that 8 is the correct solution, you must divide each 4 into quadrants. First, draw a circle around the top of the 4 to completely enclose the little box it has.

Advertisement

Want to check your work? If you draw a line connecting each numbered quadrant in the two 4s to the 8, you will find that each quadrant on the left side of the equal sign has a corresponding quadrant on the right side, proving your answer is correct!

Advertisement

First, let's show you how NOT to do it. In the circle inside each number 2, draw an Axis. You will notice that the Axis looks wrong, and that it's very hard to number each quadrant.

Answer: You're not. The number 2 is a special number whose Addition Axis consists of only a single line that divides the circle into two quadrants. Makes sense, right?

Advertisement

This method can be used on any two numbers that you need to add, so let's try 13+19. But don't worry, you can put those calculators away! This will only take a moment.

Number the quadrants. Quadrants 1 and 2 belong on the inside of the 3's half-circles, just like in the circle of a 2, and then the extra space on the outside of the 3 gets its own third quadrant.

And because the number 9 contains a perfect circle, just like a 10, it deserves an Axis of 5 lines and 10 quadrants. Number them and count them up. Does it equal 9? No, because you have to subtract 1 from the useless stick dangling below the circle.

Every. Tasty. Video. EVER. The new Tasty app is here!

Dismiss