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Year 9 Financial Mathematics
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Year 9 Financial Mathematics
Show your working for calculation questions. Round money answers to the nearest cent where needed.
Financial calculations
1.Round 8.7462 to 3 significant figures.
- 8.74
- 8.75
- 8.746
- 8.7
2.A backpack is marked at $120 and has a 15% discount. What is its sale price?
- $18
- $102
- $105
- $115
3.Oliver earns $740 each week. Assuming she works for 52 weeks, what is her gross annual income?
- $38,480
- $37,480
- $8,880
- $44,400
4.Which three are examples of income?
- Wages
- Commission
- Royalties
- A tax deduction
- A purchase
5.Simplify the ratio 24:36.
6.A delivery van covers 420 km in 6 hours. Calculate its average speed in km/h.
7.Talia buys a second-hand surfboard for $350 and sells it for $420. Find the profit and the percentage profit on the original cost.
8.Calculate the simple interest earned on $3,200 invested at 5% per annum for 2.5 years. Use I = P × R × T ÷ 100.
9.A shop assistant earns $24.50 per hour for 36 hours and receives commission of 6% on $2,750 in sales. Find the assistant’s total income for the week.
Income and pay
10.A worker has gross weekly income of $920 and pays $178 in tax that week. Calculate the worker’s net weekly income.
11.A worker is paid $4.20 for each item assembled. How much will the worker earn for assembling 165 items?
12.Describe the difference between gross income and net income.
13.Match each pay method to the way earnings are calculated.
- Hourly wages
- Commission
- Piecework
- Salary
- Rate per item multiplied by items produced
- Rate per hour multiplied by hours worked
- A percentage of sales
- A set amount paid regularly for a role
3 printable pages
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