
Evaluating expressions
Presentation
•
Mathematics
•
7th Grade
•
Practice Problem
•
Medium
Standards-aligned
PARIS MEEKY
Used 82+ times
FREE Resource
4 Slides • 6 Questions
1
Evaluating Algebraic Expressions
How can you evaluate an algebraic expression?
substitution is the process of replacing a variable with a specific numerical value or another algebraic expression
La sustitución es el proceso de reemplazar una variable con un valor numérico específico u otra expresión algebraica.
Take Notes! - ¡Tomar apuntes!
2
Evaluating Expressions
Solve by substituting the variable with the value
Resolver sustituyendo la variable con el valor
evaluate/evaluar:
2x + 4y
x = 5
y = 2
replace the variable/ reemplazar la variable:
2 (5) + 4 (2)
Solve/ Resolver:
10 + 8 = 18
3
Example 1
Replace values
Simplfy/Solve
Ejemplo 1
Sustituir valores
Simplificar/Resolver
4
Multiple Choice
What does our following expression look like after substituting the variables if w = 5 and v = 3?
8w − 2v
8(3)−2(5)
8(5)−2(5)
8(5) − 2(3)
8(3)−2(3)
5
Fill in the Blanks
6
Multiple Choice
Find the value of the following if a = 2.
10a−3
23
-23
-17
17
7
Fill in the Blanks
8
Evaluating Expressions
Solve in the parentheses first, then order of operations
replace the variable:
2(3 + 4) + 6
Solve:
2(7) + 6
14 + 6 = 20
evaluate/evaluar:
2(x + 4) + 6
x = 3
Resuelva primero los paréntesis y luego el orden de operaciones.
9
Multiple Choice
2(a - 5) + 2
22
27
14
7
10
Multiple Choice
Evaluate the expression. Let g = 3 h = 9
h2 + 2g
27
87
24
17
Evaluating Algebraic Expressions
How can you evaluate an algebraic expression?
substitution is the process of replacing a variable with a specific numerical value or another algebraic expression
La sustitución es el proceso de reemplazar una variable con un valor numérico específico u otra expresión algebraica.
Take Notes! - ¡Tomar apuntes!
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