# Math OER

Random Problems

*Truth is ever to be found in the simplicity, and not in the multiplicity and confusion of things.*

- Isaac Newton

This page has random problems for each math topic. Each time you reload the page the numbers change.

These problems also have an answer key. Get as much practice as you need.

These are the problems that will appear on our tests!

Build the habit of asking yourself if each answer you get is reasonable. Check your answers so you do not practice bad habits.

#### Decimal Accuracy

#### Estimating

#### Thinking About Division

#### Divisibility and Factors

#### Desired Denominators

#### Fractions and Decimals

#### Ratios and Rates

#### Decimal Point Scoots

#### Four Replacements for %

#### Percents, Decimals, and Fractions

#### Units and Their History

#### One Step Conversions

#### More about SI Prefixes

#### Exponents and Square Roots

#### Fraction × and ÷

#### Fraction + and −

#### Mixed Number Subtraction

#### Order and Terms

#### Percent Of

#### Percent Change

#### The One Plus Trick

#### Simple Interest

#### Unit Analysis

#### Polygon Perimeter and Area

#### Circle Circumference and Area

#### One Step Equations

#### Proportions and Cross Multiplying

#### Proportions with Variables

#### Proportion Word Problems

#### Scale Factors

#### Percent Sentences

#### Percent Word Problems

#### Temperature

#### Area Puzzles

#### Variables and Negatives