Math 20 Math 25 Math Tips davidvs.net |

Topics

Shapeshifting Changing a Number |
Mad Science Simplifying an Expression |
Justice Solving an Equation |

Math skills are like tools in a toolbox.

In Math 20 you will learn three kinds of tools:

- How to "shapeshift" a
**number**by rounding or by changing formats (fraction, decimal, percent), and switching among measurement units. - How to use "mad science" to simplify an
**expression**using arithmetic (adding, subtracting, multiplying, dividing, and exponents) and grouping structures (parenthesis, fraction bars, square roots, and algorithms). - How to use "justice" to solve an
**equation**by doing the same things to both sides of the equation, in the wise order.

Sometimes these numbers, expressions, and equations will simply be provided. At other times they will be made (using tools you will learn) from word problems involving ratios or percentages, or made from geometrical pictures.

Learning new math ideas ultimately involves changing how we think and practicing thinking critically.

Mastering our math topics is like a chair that stands on four legs: making helpful notes, writing step-by-step work, doing both "prompt" and "enough" homework, and developing good test-taking techniques. Neglecting any of these four is dangerous!