Chapter 1 Recap

Integer Operations

100

-4 - 3 x (-2)

8

200

Find the LCM of 8 and 12

24

300

Evaluate by substituting x=3 and y=-5:

2x-7y

41

400

2³-√16

4

500

Insert brackets to make this true:

2 - 5 x (-2) = 6

(2 - 5) x (-2) = 6

Decimals/Fractions

100

Round 11.082 to two decimal places

11.08

200

Round 0.00245 to two significant figures

0.0025

300

Which is larger: 5/6 or 3/4

5/6

400

Place these fractions in descending order:

8/15, 23/40, 7/12

7/12, 23/40, 8/15

500

The fraction x/3 is a number between (not including) 10 and 11. What could x be?

31 and 32

Percentages

100

Express 0.54 as a percentage

54%

200

Express 4% as a fraction

1/25

300

Convert $140 out of $5 to a percentage 

2800%

400

25% of x is $127. What is x?

508

500

In a class of 25 students, 40% have been to Europe. What number of students have not been to Europe?

15

Rates/Ratios

100

Simplify 42:28

6:4

200

Write 80cm:1.2m in simplest form

2:3

300

Divide $500 into 2:3

200:300

400

Write this rate in simplest form:

180mL in 22.5 hours

8mL/hr

500

Cordial dilution is 2 parts cordial to 3 parts water. If you have 72mL of cordial, how much water do you need?

108mL

Income and Interest

100

Cost Price: $20, Selling Price: $25

How much profit was made?

$5

200

Find the interest:

P=$5200, Rate=4%, Time=2 years

$416

300

Hourly rate is $12.50 an hour. How much would you make working 3 hours at time and a half?

$56.25

400

Annie invests $22,000 at a rate of 4%p.a. for 27 months. Calculate the amount available at the end of the 27 months.

$23,980

500

If $4500 earns $120 simple interest at a flat rate of 2% p.a., calculate the duration of the investment.

16 months