Lesson 1.2--Writing Algebraic Expressions
To translate between algebraic expressions and word phrases.
EX: Translate the following into an algebraic expression:
1. 9 less than a number
2. 3 more than a
number
3. the product of 3 and a number
4. the quotient of a
number and 5
5. one-half times a number
6. a number decreased
by 7
7. 1 more than the product of
12 and p
8. 4 less than a number
n divided by 2
9. 3 increased by the difference
of p and 5
10. 3 plus the quotient
of t and 8
and 5
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EX: Translate each algebraic expression into words.
1. 9 - 3c
4.
2. 4 + 7b
3.
5. 8(m+5)
Word Problems
EX: Gasoline costs $3.59 per gallon. Write an algebraic
expression to evaluate what the cost would be if you purchased n
gallons of gas. How much would it cost to purchase 15 gallons of
gas?
EX: Write a word problem that can be evaluated by the
algebraic expression 27 + t, and then evaluate it for t = 1.76.
Think About It!
EX: Write the following as an algebraic expression:
6 plus 4 times y
There are actually two possibilities that are correct......
So when there are two or more operations, it is important to
choose your words carefully. The terms sum, difference,
product and quotient become very helpful in understanding the
intended order of operations.
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HW: p. 12­13 16­32 even, 33­35, 37, 38, 42, 44, 46, 48 = 18 problems
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