Table of Contents

## Basic Math Operations

In basic mathematics, there are many ways of saying the same thing:

Symbol | Definitions |

+ | Addition, Add, Increase, Plus, Sum, Total |

− | Decrease, Deduct, Difference, Less, Minus, Subtraction, Subtract, Take Away |

× | Multiplication, Multiply, Times, Product, By, Lots Of |

÷ | Division, Divide, Goes Into, How Many Times, Quotient |

### Addition

Addition is bringing two or more numbers (or things) together to make a new total. The numbers to be added together are called the “Addends”:

4 + 7 = 11

where:

4 and 7 are called addends

11 is called Sum

### Subtraction

Subtraction is taking one number away from another. In subtraction, there are 3 words to remember.

Minuend :The number that is to be subtracted from.

Subtrahend :The number that is to be subtracted.

Difference : The result of subtracting one number from another.

So, subtraction is

Minuend − Subtrahend = Difference

7 – 4 = 3

where:

7 is the minuend

4 is the subtrahend

3 is the difference

### Multiplication

Multiplication is repeated addition.

4 + 4 + 4 + 4 + 4 + 4 + 4 (seven 4s) make 28

4 x 7 = 28

It can also be said that 7 + 7 + 7 + 7 (four 7s) make 28

### Division

Division is splitting into equal parts or groups. It is the result of fair sharing.

Division has special words to remember.

Let’s take the simple question of 7 divided by 4. The answer is 1, with 3 left over.

7 ÷ 4 = 1 R 3

where:

7 is the dividend

4 is the divisor

1 is the quotient

3 is the remainder

## Fraction

A Fraction is part of a whole. Fraction has 2 parts, they are numerator (top) and denominator (bottom).

The numerator says how many parts we have.

The denominator says how many parts the whole is divided into.

4/7

where:

4 is the numerator

7 is the denominator

## Decimal

A Decimal Number is a number that contains a Decimal Point.

12.345

where:

1: tens

2: ones

Symbol “.” is the decimal point

3: tenths

4: hundreds

5: thousands

## Percentage

A is parts per 100. The symbol of percentage is %

45% means 45 per 100

## Average (Mean)

Average is the sum divided by the count.

How to find average?

- adding up all the values
- divide by how many values

What is the average of 1, 2, 3, and 4?

Step 1 : 1 + 2 + 3 + 4 = 10

Step 2 : 10 ÷ 4 = 2.5

So the average is 2.5