### Order of operations

Parenthesis, Exponents/Power, Multiplication, Division/Modulus, Addition, Subtraction

Notation example

(a^{2} * b) + c – d

1. a^{2}

2. * b

3. + c

4. – d

### Proportions

`a / A = x / X`

You’re trying to solve x. You have to cross-multiply. Be mindful of order of operations.

```
x * A = a * X
x = a * X / A
```

Because I’m so nice, I coded up a very basic proportions calculator for you. Give it a try now!

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Tags:binary, computer, formula, math, multiplication, programming, simple

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If you’re doing monetary transactions through PayPal, you should be aware that PayPal takes a cut for their services. This is how you would calculate the actual amount to charge someone who owes you money. (more…)

Tags:algorithm, arithmetic, calculate, charge, cost, fee, formula, howto, math, paypal, price, processing, total

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3D game development gets into another dimension of complexity, literally. But sometimes simple is better. Let’s see some simple math equations and structures used in 2D game development. (more…)

Tags:2d, algorith, critical thinking, formula, function, game, math, problem solving

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