12 divided by sum of a number and 3 in algebriac expression is: 12 / (x+3).
The skill of translating words into algebraic expressions will come in handy when working with word problems or real life situations. Pay close attention to the "key words" that represent mathematical operations.
We are used to seeing the words, plus, sum, difference, minus, product ...
The good news is that these very same words that we use to write numerical expressions are going to be used to write algebra expressions.
The difference between a numerical expression and an algebra expression is that we will be using variables when writing an algebraic expression. Instead of "8 plus 9" (with two given numbers), you would see, "a number plus 9".
We don't know exactly "what number", so we would use a variable to indicate that it can be any number.
Key words for each operation are indicated in bold. This will help you to easily translate the expression.
Get more tips and advice on translating algebra expressions at Algebra-Class.com.
Practice translating phrases into algebraic expressions with Mathworksheets4kids.com's Algebraic Expressions Worksheets.