Transcript Algebra 1 1.1

Algebra 1
1.1
• quantity: anything that can be measured or
counted
• variable: a symbol, usually a letter, that
represents an unknown or changing quantity
• numerical expression: mathematical phrase
involving numbers and operations – no equal
sign
• variable expression: includes variables
Key Words & Phrases
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addition: plus, sum, increased by, more than
subtraction: minus, difference, less than
multiplication: of, times, product
divide: quotient
* more than and less than are actually
backwards from what you may think
ex.) 23 less than x = x – 23
Compound Expressions
* Find the “and” to figure out where
parentheses or fraction bar goes
ex.) 9 more than the difference of 17 and k
(17 – k) + 9
Practice
Write from words to expression or vice versa.
1. the quotient of n and 8
n/8 or n ÷ 8
2. 9.85 less than the product of 37 and t
37t – 9.85
3. q + 5
4. 34 – 9n
sum of q and 5
difference of 34 and 9 times m