1-1 Variables and Expressions Algebra I

Presentation

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Mathematics

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7th - 10th Grade

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Practice Problem

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Medium

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CCSS

6.EE.A.2A, 7.EE.A.2, 6.EE.A.4

Standards-aligned

Lisa Schlottman

Used 20+ times

FREE Resource

7 Slides • 5 Questions

1-1 Variables and Expressions Algebra I

What is an algebraic expression?

Sums or products of numbers and variables
terms can be numbers, variables, operations
Recall that expressions DO NOT contain an = sign

Examples

4z (one term)
5x + 2 (two terms)
r³+ 5x + 4 (three terms)
5x/4 - 1/3z (two terms)

Do you recall what exponents are?

x³means x times x times x
4/3y² means multiply 4/3 times y times y

Multiple Choice

What is 2³ ?

2 + 2 + 2 or 6

2 x 2 x 2 or 8

What are Powers, Exponents and Bases?

Translating Verbal Expressions to Algebraic Expressions

Addition: more than, sum, plus, increased by, added to
Subtraction: less than, subtracted from, decreased by, minus
Multiplication: times, product of, multiplied by or simply of (2/3 of 6)
Division: quotient of, divided by

Multiple Choice

Write and algebraic expression for

14 more than x

14x

x + 14

14/x

14 - x

Multiple Choice

Write an algebraic expression for the product of x squared and 4

2x + 4

x²+ 4

4/x²

4x²

Multiple Choice

Write and expression for six less than the quotient of z and 9

6 - z/9

z/9 - 6

9z - 6

6 - 9z

Multiple Choice

The volume of a cylinder is $\Pi$ times the radius squared, multiplied by the height (h). Write an expression for the volume.

$\Pi+r\ +h$

$\Pi rh$

$\Pi r^2h$

1-1 Variables and Expressions Algebra I

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