Grade 8 Math Review

Numbers & Operations

100

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What is the greater than symbol?

200

Cannot be expressed as the ratio of 2 numbers

What is an irrational number?

300

-4³

-64

400

If James wants to tip 21%, what will number will he use to calculate how much he will pay in one shot?

1.21

500

As a salesperson, you are paid $50 per week plus $3 per sale. This week you want your pay to be at least $100. Write an inequality for the number of sales you need to make, and describe the solutions.

3x+50>=100

3x>=50

x>=16.66(round up 17)

Geometry

100

v = x³

What is the volume of a cube?

200

a = bxh/2

What is the formula for area of a triangle?

300

a²+b²=c²

What is the Pythagorean Theorem?

400

two angles that add up to 180°

What is supplementary angles?

500

v = πr2h

What is the formula for volume of a cylinder?

Equations

100

4=7b-17

b=3

200

if y = 2, solve for x

y = 4x-30

x = 8

300

solve for y, x = 3

y+1+3x+5y = 5x+3+4y+2

5

400

change in y/change in x

What is the slope?

500

2(3x-2) = 50

x=9

Fast Math

100

7x8

56

200

4x5+12-3

29

300

8-5+6x7+1

46

400

7-3+4x8-16+3²

29

500

(3x5²)/15 - (5-2²)

4

Random

100

Each input has a single output

What is a function?

200

nine sided shape

What is a nonagon?

300

y=ax+b

What is the equation for a line?

400

perimeter of a circle

What is circumference?

500

pi

What is 3.14159265359?