Published On:Friday, 9 December 2011
Posted by Muhammad Atif Saeed
Variables and Algebraic Expressions
Variables and Algebraic Expressions
A variable is a symbol used to denote any element of a given set—often a letter used to stand for a number. Variables are used to change verbal expressions into algebraic expressions.Example 1
Give the algebraic expression.| Verbal Expression | Algebraic Expression |
|---|---|
| The sum of a number n and 7 | n + 7 or 7 + n |
| The number n diminished by 10 | n – 10 |
| Seven times the number n | 7 n |
| x divided by 4 |  |
| Five more than the product of 2 and n | 2 n + 5 or 5 + 2 n |
| Seven less than the quotient of y and 4 |  |
- Key words denoting addition:
sum
larger than
enlarge
plus
gain
rise
more than
increase
grow
greater than
- Key words denoting subtraction:
difference
smaller than
lower
minus
fewer than
diminish
lose
decrease
reduced
less than
drop
- Key words denoting multiplication:
product
times
of
multiplied by
twice
- Key words denoting division:
quotient
ratio
divided by
half
