8A Maths

Directed number

100

-4 x -7 =

=28

200

-5³

=-125

300

4+-6--5x4

=-22

400

(4-18) divided by (-8+6)

=7

500

(-8a - 4)²

64a+16

Fractions, Decimals, Percentage

100

one half plus three quarters equals

=One and a quarter

200

1.43 x 2.56 = 

=3.6608

300

what is 15% of $50?

=$7.50

400

What is $6500 increased by 12%?

10% = 650

1% = 65

12% = 780

= $7280

500

Find the simple interest on $30000 at 4.5% for 4 years

$1350 Pa

$5400 for 4 years,

Measurement

100

Convert 4555m into Kilometres

4.555Km

200

What is the formula for Circumference

C = 2 x Py x Radius

or

C= Diameter x Py

300

A triangle had a base of 80cm and a height of 0.4m. What is its area?

1600cm²

or

.16m²

400

Convert 7.5m³ to cm³

7500000cm³

500

A room is 2.3 m high, 5.8 m long and 4.5 m wide. What is the rooms volume?

60.03m³

Algebra

100

Simplify 3a + 5f - 3f + 3a

=6a+2f

200

6a² x 4ba = 

= 24a³b

300

Solve for a

6a - 104 = 16

a = 20

400

Factorise

-12a² + 20a

=-4a(3a - 5)

500

Solve for a

3(2a - 3) = 9(4a - 21)

a=6

Probability

100

If a six sided die is tossed.

What is the probability of rolling a number less than 5. 

4/6 or 66.6%

200

In a bag of 3blue, 7 red, 9black and 1 green marbles. 

What is the probability of selecting a blue marble. Give your answer in a percentage

3/20 = 15/100

=15%

300

                  Has a cat             Does not have a cat

Has a dog       9                                  6

doesn't 

have a dog     11                                 4

What is the probability that a student has a cat but not a dog?

11/30 

or

36%

400

Construct a Venn diagram to represent

32 students 

16 play soccer

18 play basketball

8 students don't play any sports

8 outside

Only soccer =6

Only Basketball =8

Intersection = 10

500

When rolling 2, 6 sided die.

What is the probability of rolling two numbers which when added together are above 9. 

4,6  5,5   5,6  6,4  6,5 6,6 

6/36 = 16%