You can guess what your friends are thinking by learning to

“operate” your way into their minds! For example, try this math magic trick.

**Think of a number.Multiply the number by 8, divide by**

2, add 5, and then subtract 4 times the original number.

2, add 5, and then subtract 4 times the original number.

No matter what number you choose, the answer will always be 5. Try another number and see. You can use what you know about variables to prove it. Here’s how:

Invent your own math magic trick that has at least five steps.

Show an example using numbers and variables. Try it on a friend!

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