Algebraic Expressions

Algebraic Expressions

MAFS.EE.1.2

Objective

• Write, read, and evaluate variable expressions

• Apply the order of operations on expression with variables, including those with exponents

• Translate an expression from it’s to an algebraic expression and vice versa 

• Identify parts of expressions using appropriate mathematical vocabulary.

Vocabulary

• Coefficient: the known number that is a factor of a variable term.

• Constant: a term that is a known number without variables.

• Variable: a letter that stands for an unknown number

• Term: a known number, a variable, or the product of a known number and variables

• Variable term: a term that includes variables

Multiple Choice

What is a variable?

• a term that includes a variable

• a letter that stands for an unknown number

• a term that is a known number without variables

Multiple Choice

What does the letter x stand for?

• a letter

• an unknown number

Multiple Choice

Which operation is represented by 2x?

• addition

• subtraction

• multiplication

• division

Multiple Choice

What do you call the result of multiplication?

• sum

• difference

• product

• quotient

Open Ended

Describe the expression 2x+5.

Open Ended

Claire says the expression  $8x^3$  has three terms: 8,x, and 3. Is she correct? Explain. 

Fill in the Blanks

Write an expression with the same meaning as "subtract a number times 4 from 10." (Use x as a variable if needed)

Multiple Choice

How many terms are in 10-4x?

• 1

• 2

• 3

• 4

Fill in the Blanks

What is the coefficient in the expression 10-4x?

Fill in the Blanks

What is the constant in the expression 10-4x?

Multiple Choice

Write an expression with the same meaning as "the result of multiplying $\frac{1}{2}$  by a number, then subtracting 9."

•  $\left(\frac{1}{2}\cdot9\right)-x$  

•  $\frac{1}{2}x-9$  

•  $\frac{1}{2}-9x$  

•  $\frac{1}{2}x+9$  

Multiple Choice

Write an expression with the same meaning as "7 less than the square of a number."

• $7-x^3$

• $x^3-7$

• $x^2-7$

• $7-x^2$

Multiple Choice

Write an expression to represent "the sum of 3 and the quotient of a number divided by 6."

• $3\div6$

• $\left(3+x\right)\div6$

• $3\div x\ +6$

• $3+\left(x\div6\right)$

Multiple Choice

Martina is 3 inches less than twice as tall as her little brother. Write an expression for Martina's height.

• 3x-28

• 3-2x

• 2x-3

• 3x-2

Fill in the Blanks

Martina is 3 inches less than twice as tall as her little brother. How tall is Martina if her little brother is 28 inches tall?