Year 9 Math - Term 3 Intro

Measurement

100

Convert 1m in to cm.

100cm

200

Convert 15mm to cm.

1.5cm

300

What is the perimeter of a square that has sides of 5m.

20m

400

What is the area of a square that has sides of 5m?

25m²

500

What is the rule for area of a triangle?

(b x h) / 2

Algebra

100

Solve expression when x = 2.

x +3

5

200

Solve expression when x = 3.

3x + 1

10

300

Expand the expression.

2(x + 1) 

2x + 2

400

Factorise the expression.

3x + 12

3(x + 4)

500

Solve the expression to find the value of x.

3x + 1 = 22

x = 7

Finance

100

Convert 0.4 to a percentage %

40%

200

Increase $100 by 25%

$125

300

Discount $200 by 10%

$180

400

If simple interest is P x i x n.

What does P represent

Principle (amount of money)

500

Simple interest is P x i x n. How much interest is earned on $500 in an account for 3 years at 5%

$75

Index Laws

100

Write 5 x 5 x 5 using index notation

5³

200

Write a x a x a x 4 x 4 using index notation

a³4²

300

Simplify with index laws. 

5⁰

1

400

Simplify using index laws.

7³ x 7⁴

7⁷

500

Simplify using index laws. 

(a²)⁴

a⁸

Fun Facts - Animals

100

Which Bird is able to run faster then a horse?

Ostrich

200

Half of the pigs on earth live in which country?

China

300

America tried to train what animal to drop bombs in World War 2.

Bats

400

Which animal can only eat with its head upside down?

Flamingo

500

A blue whale weighs roughly the same as how many elephants?

30