Variables!

Vocabulary

100

What is a variable?

letter that replaces a number

200

What does substitute mean?

Take the place of

300

A number multiplied by the variable

What is the coefficient?

400

Division, multiplication, subtraction, addition are all examples of these.

What are operations?

500

What division is to multiplication, and addition is to subtraction, and vice versa.

What are inverse operations?

Substitution

100

2 + w for w = 6

8

200

12 - m for m = 3

9

300

6 * r for r = 10

60

400

p / 5 for p = 35

7

500

2 + g - 4 for g = 12

10

Key Words

100

Sum means?

addition

200

Product means?

Multiply

300

Quotient means?

Divide

400

Difference means?

Subtract

500

Less than means?

Subtract

Writing Expressions

100

15 more than a number

15 + n

200

A number decreased by 7

n - 7

300

The quotient of a number and 3

n/3

400

3 times a number

3 x n

500

5 less than a number

n - 5

It's all relative

100

357.1 + 23.9

381

200

Solve 2³

8

300

What would be the first step in this problem?

23 - 4 x 6(6 - 2) + 18

Parenthesis (6-2) 

400

The expressions 2(2), 2·2, and 2*2 all mean the same thing. They all tell us to do what operation?

Multiply!

500

True or false: A variable can be any symbol (a, b, ★) that represents an unknown value.

True!