Year 8 Maths

Rational Numbers (fractions)

100

In simplest form,  

3/4 + 5/4 =

2

200

In simplest form,  

7/10 + 5/20 = 

19/20

300

In simplest form,  

3/8 + 15/24 = 

1

400

In simplest form,  

4/12 x 6/8

1/4

500

In simplest form,  

4/15 divide 2/5

2/3

Integers

100

5-10=

-5

200

144 - - 16 =

160

300

-23 + 11 = 

-12

400

-24 x -3 =

72

500

-42/7 - 10 = 

-16

Percentages

100

5% of 40

2

200

70% of 500

350

300

If I bought my car for $5000 and sold it for $6000, what percentage profit did I make? (from the cost price)

20% profit

400

If I bought a second hand computer for $400 and sold it for $60 a year later, what was my percentage loss? (from cost price)

85% loss

500

If I'm going to sell my ice-creams at a 75% profit margin, and a bought a whole tub for $5, what am I going to sell it at?

$8.75

Statistics

100

Find the mode:

2,2,3,3,3,4,4,4,5,5,5,6,6,6,6,7,7,7,8

mode = 6

200

I the following data discrete, continuous, nominal or ordinal?

1st Place, 2nd Place, 3rd Place, 4th Place

Ordinal

300

Find the Range:

3, 6, 8, 13, 14, 8, 19, 18, 13, 14, 15, 5, 6, 8, 2, 4, 5

Range = 17

400

Find the median:

3, 5, 6, 7, 2, 4, 5, 3, 5, 6, 7

Median = 5

(2, 3, 3, 4, 5, 5, 5, 6, 6, 7, 7)

500

Find the Mean:

2,2,2,2, 3,3,3,3,3,3, 4,4,4,4,4,4, 6,6,6,6, 7,7

Mean = 4

(88/22)

Geometry

100

What is the longest side of a triangle called?

hypotenuse

200

What is the perimeter and area of a rectangle with side lengths of 10cm and 20cm

Perimeter: 60cm

Area: 200cm^2

300

What is the area of a square with perimeter 20 cm?

25 cm²

400

What is the area of a triangle with base 2 meters, height 80 cm?

0.8 m² or 8000 cm²

500

What is the volume of a rectangular prism with length 40 cm, width 80 cm and height 30 cm? 

96 000 cm³