Math 7 Review

Exponents

100

In the expression:

8⁴ 

What is the exponent?

4

200

In the expression:

8⁴ 

What is the base?

8

300

Read/say this expression using repeated multiplication (an exponent): 

7⋅7

7² ("7 squared, 7 to the power of 2, 7 to the second power")

400

What is another way to read/say this expression?

x²

"x squared," "x to the power of 2", or "x to the second power"

500

The area of a square is s², where s is the side length. Find the area of a square with side length 5 units.

25

Order of Operations

100

What phrase/letters help you remember the order operations?

GEMDAS

200

Do you add, subtract, or divide first? 5+(8-3)÷9

Subtract (grouping symbols)

300

What are the 2 last things you do in the order of operations?

addition and subtraction

400

Evaluate: 3 + 5²

28

500

What are the 2 groups in the order of operations that you go from left to right on?

addition and subtraction, and multiplication and division

Evaluating Algebraic Expressions

100

Evaluate the expression:

50 + m 

for m=20

70

200

Evaluate the expression:

9n 

for n=5

45

300

Evaluate the expression:

p + 3p 

for p=7

28

400

Evaluate the expression:

7+c³

for c=2

15

500

Evaluate the expression: 

2r²+s² 

for r=7 and s=6

134

Variables

100

What is a variable represented by?

a letter

200

What is the variable in this expression? d-6

d

300

What is the variable? g-5+g

g

400

What are the variables? r - 4 ÷ r + z

r and z

500

What are the variables? t + x ÷ y

t, x, and y

GEMDAS

100

What does the A stand for in GEMDAS?

addition

200

What does the S stand for in GEMDAS?

subtraction

300

What operation do you calculate first, according to GEMDAS?

grouping symbols

400

What does the E stand for in GEMDAS?

exponents

500

What do you calculate first, according to GEMDAS - multiplication or division?

Which ever one comes first in the problem when reading from left to right.