The Language of Algebra

Presentation

•

Mathematics

•

9th Grade

•

Hard

•

CCSS

6.EE.A.2B, 6.EE.A.2C

Standards-aligned

Christopher Gassler

Used 93+ times

FREE Resource

8 Slides • 6 Questions

The Language of Algebra

Objective: To identify variables and constants in expressions and equations.

Constant: a fixed value, a number on its own, whose value does not change.

A constant may either be positive or negative.

Vocabulary

Example: 4x + 2

Example: -7x - 14

(2 is the constant)

(-14 is the constant)

Variable: any letter or symbol that represents a changeable or unknown value.

Vocabulary

Example: 4x + 2

x is the variable

Coefficient: the number multiplied by the variable. It is located in front of the variable.

A coefficient may either be positive or negative.

Vocabulary

Example: 4x + 2

Example: -8x + 3

(4 is the coefficient)

(-8 is the coefficient)

Coefficient: **special note**

If there is no visible coefficient, then 1 is the coefficient.

Vocabulary

Example: x + 7

-x + 7

-1x + 7

1x + 7

same thing

Fill in the Blanks

What is the constant in 7x - 3

Type answer...

Fill in the Blanks

What is the coefficient of x:

x - 145 = 5

Type answer...

Term: a number (like 5)

a variable (like y)

the product of a number and variable (like 3x)

the product of a number and variables (like 8xy)

Terms are separated by + or -

Vocabulary

Example: 6x + 7

first term

second term

Fill in the Blanks

How many terms are in the following expression?

2x + 4y - 8 + 12xy

Type answer...

Fill in the Blanks

What is the coefficient of the third term?

12w - 5s + 16y + 3abc

Type answer...

Fill in the Blanks

What is the sum (+) of the coefficients of the second and third terms?

12w - 5s + 16y + 3abc

Type answer...

Vocabulary

Equation: two expressions balanced with an equal sign.

Vocabulary

expression 1 = expression 2

Multiple Select

Which of the following are algebraic expressions?

4x - 9

$14\left(35\div2\right)$

8x - 9 = 12

$16-\frac{1}{4}x$

$9x-\frac{1}{4}=\frac{x}{200}$

The Language of Algebra

Objective: To identify variables and constants in expressions and equations.

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