If you hate long division like I do, then this lesson will be very useful in showing you how to make the most out of your division tasks without losing sleep over it. It’s easy, quick, and a whole lot…
Division
Category: 5th Grade
Fold a Cube
There’s more than one way to fold a cube. So print out the attachment, grab some tape and sticky notes and we’ll have some fun with geometry! How many different shapes can you use to make a cube? NOTE: You’ll…
Bagels
This is one of my family’s favorites! It’s a guessing game, but you can use logic and strategy in order to guess the numbers very quickly. In this video, I’ll show you in more detail how it works. I’ll also…
Shift Cipher
Shift ciphers were used by Julius Caesar in Roman times. A key is a number that tells you how many letters you’ll shift in the alphabet. These are fairly simple to encode and decode. However, you have to be extra…
Telephone Cipher
Code machines – or cipher machines – can be used to encode and decode messages. One everyday example of a code machine that you can easily access is a telephone. Watch this video and I’ll show you how it works.…
Graphical Multiplication
The trick looks impressive, so be prepared for jaw-drops when you show this to kids and adults. But can you figure out how it works? I’ll give you a hint: think about how to represent placeholders of powers of 10……
How to Add and Multiply Quickly in your Head
Want a peek under the ‘hood’ of my brain when I do a mental math calculation? This video is a slow-motion, step-by-step snapshot of what goes on when I add numbers in my head. The first thing you need to…