# Basic Math Concepts

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### How to Find the Mean and Median in Quantitative Data

Quantitative data assigns a numerical value to each member of a statistical sample. You can use this information to find the mean and median values.

The following sample — which is purely fictional — uses

### How to Work with Qualitative Data

In statistics, qualitative datadivides a data set (the pool of data that you’ve gathered) into discrete chunks based on a specific attribute. You can then find information such as percentage amounts and

### How to Create Your Own Multiplication Table

If you have trouble multiplying numbers, then you should get to know the multiplication table. There are two multiplication tables you can use: the cumbersome old table, and the newer, easy-to-use short

### How to Do Long Division by One Number

In the olden days, knowing how to divide large numbers was important. Basic long division is still good to know, so the following examples will show you how to divide a one-digit divisor into another number

### Find a Starting Amount from a Final Amount

Some math word problems give you the amount that you end up with and ask you to find out how much you started with. These problems can be difficult if you’re not used to thinking backwards. Here’s an example

### Plot Cartesian Coordinate Points on a Cartesian Graph

When math folks talk about using a graph, they’re usually referring to a Cartesian graph (also called the Cartesian coordinate system). The below figure shows an example of a Cartesian graph.

### How to Solve Problems with a Cartesian Graph

You can use a Cartesian graph to solve certain types of math problems. When you draw two lines that represent different parts of a word problem, the point at which the lines intersect

### How to Solve a Geometry Word Problem

In order to solve a geometry word problem, you need to read the problem carefully, recognize shapes in the drawing, pay attention to labels, and use whatever formulas you have to help you answer the question

### How to Draw Lines on a Cartesian Graph

By plotting points on a Cartesian graph, you can draw lines between these points and use them to show mathematical relationships. The following examples focus on the number of dollars that two people,

### Calculating GPA

Nowadays, grade point averages are a big deal, especially for college-bound students and their anxious parents. GPA is easy to calculate if you understand that it's simply an average. To determine an average

### Calculating Area and Volume for Household Projects

Many household projects require that you be able to calculate area or volume. Whether you're painting your kid's room, mulching your flowerbed for the winter, planting grass seed in the spring, or tackling

### Using Your Body to Estimate Length

Many real-life math problems don't require exact solutions or precise calculations. When you need an approximate idea of length, you have a handy-dandy

### Calculating Speed, Time, and Distance

If you drive a car or have ever flown in an airplane, you've probably noticed that time, speed, and distance are related. Here's the basic formula for distance

### Nine Ways to Make Any Exam Easier

Exams, especially those covering basic maths, can be stressful and frustrating, and not many people enjoy doing them. But jumping through the hoops of an exam doesn’t have to be hard. If you can reach

### Ten Pitfalls to Avoid on Basic Maths Tests

When you’re under pressure in a maths test, you’re bound to make some mistakes. But some mistakes are avoidable when you know how; there are also some mistakes you can learn to check for and put right.

### Ten Tricks for Remembering Your Number Facts

Learn your number facts efficiently and with the minimum of fuss. The quicker you can command total mastery of your number facts, the quicker you can stop having to learn them, and the more time you can

Dozens of good websites offer games to help you learn maths facts and techniques. Some are fun, others serious, and others somewhere in between. Here are some favourites:

### How to Solve Probability Problems with the Number Line

Marking where you think a probability lies on a number line is an obvious way to deal with probabilities on a basic maths test. The left end of the line represents ‘impossible’ and the right end represents

### How to Estimate Probability with Experiments

The most reliable way to estimate the probability of an event happening is to do an experiment. You need to know about two kinds of probability experiment. In the first type, you repeat things under pretty

### How to Read and Work with Probability Trees

Teachers around the world use probability trees. Probability trees are quite versatile if you use them properly. The idea of a probability tree is to start on the left with ‘the whole thing’ or one. Every

### How to Read and Work with Probability Tables

A probability table is a way of representing probabilities. The following probability table looks at the events ‘throwing a head on a fair 50p piece’ and ‘throwing a head on a fair £1 coin.’

### How to Read and Work with Probability Squares

Probability squares are a really good option when you have two independent events – two things that don’t affect each other. You may like probability squares if you’re more a ‘shapes person’ than a ‘numbers

### The Three Types of Average – Median, Mode and Mean

We use three different types of average in maths: the mean, the mode and the median, each of which describes a different ‘normal’ value. The mean is what you get if you share everything equally, the mode

### What You Need to Know About Ranges

The range of a set of values is a really useful description of a list to show how spread out the values are – or the difference between the biggest and the smallest values.

### How to Draw Bar Charts on a Computer

To draw a bar chart – in fact, any kind of chart – in a spreadsheet, you need to do two things: enter your data into the program, and tell the program to draw a graph.

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