# Writing algebraic expressions in words

Instead of "8 plus 9" with two given numbersyou 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. Writing simple expressions Before you can tackle complex word problems, you need to know how to translate simple problems into algebra. Of is the tricky word. Algebraic Expressions and Key Words for Multiplication The key words for multiplication are: times, product, twice, doubled, multiplied, and of.

Key words for each operation are indicated in bold.

### Writing algebraic expressions from word problems

This is most important for operations that are not commutative, such as subtraction and division. In other words, there are plenty of word problems. Quotient is also a key word for division. As you begin to work with algebraic expressions more, you will see word problems that require you to use more than one operation. Others are simple, like descriptions of a math problem. Think about this The next lesson in this unit is on simplifying algebraic expressions. Remember that subtraction is not commutative, so the order in which write the digits does matter! This is a very brief lesson on simple algebraic expressions. Algebraic Expressions and Key Words for Subtraction Our key words for subtraction are: minus, less, subtract, decrease, younger than, and lowered. The difference between a numerical expression and an algebra expression is that we will be using variables when writing an algebraic expression. A quotient is the answer to a division problem. We'll start with simple word problems, then move on to slightly more complex ones.

Division is not commutative, so you must pay close attention to the order in which you write the expression. Some word problems have real-life details—almost like a short story.

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