Numbers

Terminating decimal 
- Contains a finite number of digits. In other words, there is an end to the division process. 
- E.g. 0.525 is a terminating decimal.

Repeating decimals 
- Has one or more digits that are repeated infinitely. 
- Place a dot above the repeating digit when writing. 
- If there are three or more repeating digits, place the dot over the first and the last repeating digits. 

Non-repeating, non-terminating decimals 
- These decimals continue without end, but do not have a repeating pattern. For example, π is not a rational number since it cannot be expressed as a ratio of two intergers. 

Note the following: 

Laws of Arithmetic

1. Commutative Law
a + b = b + a
ab = ba

2. Associative Law
a + (b + c) = (a +b) + c
a(bc) = (ab)c

3. Distributive Law
a(b ± c) = ab ± ac

When Multiplying and Dividing Positive and Negative Numbers, do note:
If the signs are the same, then (+) is used.
If the signs are different, then (-) is used. 

Watch the following video to gain a better understanding: 

Concept Map

Here is a round-up: