Variables and expressions
A variable is a letter or a symbol used to represent a value that can change.
A constant is a value that does not change
A numerical expression may contain only constants and/ or operations.
A algebraic expression may contain variables,constants and/or operations
In order to translate between algebraic expressions and words,you need to know how to write the algebraic expression in words.
+ is also known as plus, increased by, added to, sum of , more than ,etc
- is also known as minus, difference, decreased by, less than etc.
* is also known as times product, multiplied by, etc.
÷ is also known as divided by, quotient, etc
M+5 in words is m plus 5 or the sum of m and 5 or m increased by 5 or m more than 5
M-5 is m minus 5 or the difference of m and 5 or m decreased by 5 or m less than 5
M * 5 is m times 5 or the product of m and 5 or m multiplied by 5
m÷ 5 is m divided by 5 or the quotient of m and 5
To translate words to algebraic expressions look for words than indicate the action
+ = put together, with ,and, combined, etc
- = separated into,then, find how much more or less.
* = put together, per, equal groups
÷= separated into equal groups
Ahmed ran 5 miles per day.write an expression for the number of miles ahmed ran in d days
5 * h or 5h
Guy was 2 inches taller than dude, who is y years old.
y-2 = dudes age
Brad bought 5 apples,and then bought a apples more. Write an expression for the amount of apples brad bought.
Jack read 5 pages every minute. Write an expression for the amount of pages jack wrote.
To evaluate algebraic expression all you need to do is substitute the numbers to the variable