Lesson 2.1: Evaluating and Writing Algebraic Expressions
Variable:
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Algebraic Expression:
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Examples: ______________
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Evaluate Each Expression: Use p = 2, n = 3, and s = 5
Substitute and Solve
a. 2p + 7 =
b) p + (n ∙ s)
Evaluate Each Expression: Use n = 3, t = 5, and y = 7
a. n + 2t
b) n + (t ∙ y)
Writing Algebraic Expressions:
● a temperature of t degrees increased by 5 degrees
● five cats fewer than c cats
c) 3n + t – 2y
● the product of 5 and n nickels
● a dinner bill of d dollars divided among 5 friends
Write a Word Phrase for Each Expression
a. 5 + n
b) p /3
c) c – 50
Guided Practice
Evaluate: Use m = 7, r = 8, and t = 2
a. 5m – 6
b. 4m + t
c) 4t + 18
d) r ÷ t
Write a Word Phrase for Each Expression:
a. n + 16
b) 3.2 (n)
c) 25.6 – n
Write a Algebraic Expression for Each Word Phrase:
a. sum of 12 and m
c) 15.4 less than n
b. s divided by 10
d) the product of 8 and x