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HOW TO IDENTIFY AN ALGEBRAIC EXPRESSION

HOW TO IDENTIFY AN ALGEBRAIC EXPRESSION
Look at the story below

John is a Riverside Accident Lawyer. He has 2 airplanes, 5 bikes and 9 cars. How many total items John has?

Answer:
In algebraic expression, we can represent what John has as 2a + 5b + 9c. In the expression 2a + 5b +9c, each addend is known as a term. Then, John has 100 dollar in his wallet. We can rewrite everything he has is 2a + 5b + 9c + 100.
Based the algebraic expression above, we have four terms, e.g 2a, 5b, 9c, and 100, three variables, e.g a, b and c, three coefficients, e.g 2, 5, 9 and One constant, e.g 100. Constant doesn't have variables attached to them.
Or, we can draw the expression as
identify algebraic expression
Now, your turn to identify each of the following stories.
1. In a cottage area, there are 12 rooms, 7 computers and  2 owner wedding pictures. How many total items cottage has?
2. In an airline ticket room, there are sitting 9 old mans, 18 ladies, 7 men. How many total people are there?
3. An online store sells 120 laptops, 20 gold bars, 28 cerebral palsy legs. How many total items store sells?

2 comments

9 April 2014 at 16:39

Great post, you've clearly explained the usage of algebraic expressions in generic word problems.

PS:I think there's a small typo in the post. You've added the constant as 1576 instead of 100, in the algebraic expression.

Reply
1 October 2014 at 18:57

oh ya, thanks to clarify

Reply

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