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Year 9 Financial Mathematics
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Year 9 Financial Mathematics
💰 Part 1: Multiple Choice Questions
1. Round 3.4567 to 3 significant figures:
3.45
3.46
3.457
3.5
2. A shirt costs $80 and is discounted by 25%. What is the sale price?
$20
$55
$60
$75
3. Sarah earns $600 per week. What is her annual gross income?
$31,200
$28,800
$30,000
$7,200
4. Which of the following are types of income? (Select all that apply)
Salary
Commission
Royalties
Tax deductions
📊 Part 2: Calculations and Problem Solving
5. Express the ratio 15:20 in its simplest form.
6. A car travels 350 kilometres in 4 hours. Calculate the average speed in km/h.
7. Jake buys a bike for $400 and sells it for $480. Calculate:
a) The profit: $ __________
b) The percentage profit: __________%
8. Calculate the simple interest earned on $2,500 invested at 4% per annum for 3 years.
Simple Interest = P × R × T ÷ 100
9. Emma works as a sales assistant earning $22 per hour for a 38-hour week, plus 8% commission on sales. Last week she sold $3,200 worth of goods. Calculate her total weekly income.
💼 Part 3: Real-World Applications
10. Tom's gross weekly income is $850. Using the tax table below, his weekly tax is $165. Calculate his net weekly income.
Net Income = Gross Income - Tax
Net Income = $ __________
11. A factory worker is paid $3.50 per item produced (piecework). If they produce 180 items in a week, calculate their weekly wage.
12. Explain the difference between gross income and net income in your own words.
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