Writing Expressions
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ADDITION Sum And Plus More than Increased by |
SUBTRACTION Difference Minus Less Fewer Decreased by "Turn around words"
Less than Fewer than From |
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MULTIPLICATION Product Times Of Twice Triple |
DIVISION Quotient Per Divided by Ratio |
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(Parenthesis words) Times the sum Times the difference Plus the difference of |
Equal Is Total The same as |
Let's look at some examples of how to write expressions given a verbal description.
- The product of a number and 8 8n
- The sum of a number and 12 n + 12
- The quotient of a number and 8
- 12 increased by a number n 12 + n
- 15 less than a number n - 15
- 4 times the sum of x and 3 4(x + 3)
- 12 miles per n gallons 12 miles/ n gallons
- n decreased by x n - x
- y doubled 2y
- 5 less y 5 - y
- 5 less than y y - 5
- 4 divided by y
- 4 divided into y
- five less than the product of 2 and x 2x - 5
- the difference of x and 3 divided by 6
- two less than one-fourth of y 1/4 y - 2
- fifteen decreased by the quotient of a number and 3
- the sum of twice a number and 5 2n + 5
- 12 more than the quotient of a number
and 5 is negative 10
- Jim's age is 3 times Sarah's age J = 3S
- The length is 5 more than the width L = 5 + w
- The amount of money you will earn if you make $7 per hour for x hours A = $7x
- One third of a number increased by seven is five less than twice the number 1/3n +7 = 2n - 5
A few last tips...
Memorize the most common words for each operation. Always look for "turn around" and (parenthesis) words. When writing an expression for a word problem use variables that are representative of the problem. For example, lett h represent hours.
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Related Links: Math algebra Dependent and Independent Variables Measures of Variability : Mean Absolute Deviation |
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