Variables

Variables

100

What is a variable?

A variable is a letter that represents an unknown number.

200

What does substitution mean?

Substitution means replacing a variable in an equation with a known number.

When given the equation, x+2=8, and x=6, then 6+2=8.

300

Which is the variable in the expression

6 + b    

b

400

What is the variable in 8(4/2-1)+3z?

z

500

Which is the variable in the expression

4r - 3(4 x 2)

r

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

Random

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

65-5²

40

500

(65-5²) – (6-3)²=

31