# Directed Numbers Math Review

math tutorials > directed numbers

## Directed numbers are just numbers with a positive or negative sign in front of them!

**Directed numbers** are signed numbers i.e. numbers with
a positive or plus sign (+) in front of them or a negative or minus sign
(-) in front of them e.g. +6, -2, +7 etc. All these whole numbers (and
0) grouped together are called **integers**.

These numbers can be represented on a number line.

A **positive number** signifies a movement to the right.

A **negative number** signifies a movement to the left.

A number lacking a sign is positive.

## Adding and Subtracting.

e.g. +2 + -3 + 2

+2 + -3 + 2 = __+1__

__ __

*Note:* A double negative changes to a single positive e.g. +3 -
-3 = +3 +3 = __+6__

A negative sign with a positive sign changes to a single negative

e.g. 3 + -4 = 3 – 4 = __-1__

3 + -4 = 3 – 4 = __-1__

## Multiplying and Dividing.

The following rules apply:

+ x + = + | +6 x +6 = +36 | |

+ x - = - | +6 x -6 = -36 | |

- x + = - | -6 x +6 = -36 | |

- x - = + | -6 x -6 = +36 |

The same rules apply for division

## Math problems for you to try.

Note: Remember the correct order of operations.

- 8 - 11
- 5 - (-2)
- 9 - (6 - 9)
- -3 x -4
- -11 - (3 + 4)
- 3 x (-2)²

*Solutions:* 1) -3 2) +7 3) +12 4) +12 5) -18 6) +12