Different Ways to Represent Mathematical Operations Symbols
In order to work with math, it is important for you to understand mathematical symbols. This includes things like the +, , x, ÷. You will find as you progress in math that there are many ways to write the same thing. Here's an example of different ways to write the same division and multiplication equations:

Here's a video that explains why we don't always use an "x" as the multiplication sign.

Translating Word Problems
When working with word problems or trying to put real world problems into equations. It is helpful to understand what other words are used to describe different math operations. Here's a chart that can help:
Addition
plus and sum or sum of altogether all in all together total or total of total number add or added to increased by combined 
Subtraction
subtract minus difference difference between greater than more than take away fewer than less or less than How many more? How many left? How many less is left decreased by from 
Multiplication
product multiply multiply by times at (3 at $1.50) double, triple, etc. twice of (three fourths of a number) 
Division
quotient dividend divide divided by each per average divide equally half of goes into out of ratio of percent 
Equal
equals is equal to is is the same as are was were will be gives yields sold for is equivalent to 