Integers
78 - -91 =
169
8 x (9-2) - 15 = ?
41
Simplify the following: k15 x k2
k17
Write 2.9 x 103 as a basic numeral
2900
In a laboratory test on 360 light globes, 16 globes were found to be defective. What percentage were satisfactory, correct to one decimal place?
95.6%
81/-9 =
-9
15 + (9 -3)3
231
Simplify the following: (q4)2
q8
Write 0.000019 in scientific notation
1.9 x 10-5
The cost of producing a chocolate bar that sells for $1.50 is 60c. Calculate the profit made if 48 bars of chocolate are sold.
$43.20
2 x -5 x 10 =
6/2 - (6+1)2 + (15+3/3)
-52
Write the following as a basic numeral: (52)2
2625
Write 9900000 as scientific notation
9.9 x 106
A leading tyre manufacturer claims that a new tyre will average 12% more life than a previous tyre. The owner of a taxi fleet finds that the previous tyre averaged 24 000 km before replacement. How many kilometres should the new tyre average?
26,880km
-10 + -90 =
-100
(3 - 2)0 + (15/3)2 - 20
6
Write the following with a positive index: 5-3
1/125
Write 9.9 x 1010 as a basic numeral
99000000000
If a train travels 165 kilometres in 1 hour 50 minutes at a constant speed, calculate how far it could travel in 4 hours?
360km
-81/9 + -3 =
-12
x - 2(x + 3x) + x2
-7x + x2
Write the following with a positive index: 3x-5
3/x5
Write 0.0000078 as scientific notation
7.8 x 10-7
In a population of 31.4 million people, 2,115,000 are under the age of 16. Calculate the percentage, to two decimal places, of the population who are over the age of 16.
93.26%