With all of the rules and scenarios, remembering how to add and subtract negative numbers can be difficult. Here’s a little trick to help you remember. Let’s say we want to solve 3 plus -7. First, imagine a number line with a bird sitting on our first number, 3. The operation plus or minus tells…

# Iacm Umbai

# Tag: math

### The paradox of the derivative | Essence of calculus, chapter 2

The goal here is simple: Explain what a derivative is. Thing is, though, there’s some subtlely to this topic, and some potential for paradoxes if you’re not careful, so the secondary goal is that you have some appreciation for what those paradoxes are and how to avoid them. You see, it’s common for people to…

### Art of Problem Solving: Simon’s Favorite Factoring Trick

Art of Problem Solving: Simon’s Favorite Factoring Trick with English Subtitles Created By Philjae Chang, KGSEA MATH CIRCLE Now you know I like to show off some of my best stuff in these videos. But in this one, I’m gonna show you Simon’s favorite factoring trick, which I learned from Simon himself. You don’t, you…

### Can you solve the dark coin riddle? – Lisa Winer

You heard the traveler’s tales, you followed the crumbling maps, and now, after a long and dangerous quest, you have some good news and some bad news. The good news is you’ve managed to locate the legendary dungeon containing the stash of ancient Stygian coins and the eccentric wizard who owns the castle has even…

### Times table trick using your hands

Times tables using hands by TecMath In this video we are going to be having a look at how you can use your hands to work out some of the times tables the times tables involving and these numbers only the sixes,sevens,eights,nines and tens. It’s a good method especially for guys first working out their…

### Response: Magic Square Tutorial

Hello, everyone! Recently, I taught my YouTube friend Mismag822 how to make a 4×4 magic square for any number. Now, I didn’t give away all my tricks. I’m going to go one better now and I’m going to make a 5×5 magic square. Now, you can see Mismag’s video tutorial in the link in the…

### A simple trick to design your own solutions for Rubik’s cubes

Today I’m going to tell you about something that’s really close to my heart. It’s a super simple trick that allows you to find your own solutions to pretty much any Rubik’s Cube on that shelf. That sounds too good to be true but it’s actually true, it’s really quite amazing. So, what I’m going…

### Fast Math Tricks – How to multiply 2 digit numbers up to 100 – the fast way!

G’day and welcome to the TecMath channel. In this video today we are looking at the fast way of multiplying two two digit numbers together….so let’s go! First of all we’ll see if you can multiply some numbers together I’ll give you a question which is twenty-one times thirty one. I’ll give you six seconds…