Curriculum placement
Grade 7. This describes the skill, not a learner estimate.
Income tax, budgets, and net worth
Compute bracket income tax, payroll and property tax, budget percents, net worth and the lowest final cost among discounts
Problem types
- Income tax from a bracket table
- Payroll, sales and property tax amounts
- Budget shares as percents
- Assets, liabilities and net worth
- Compare coupons, discounts and rebates
Builds on
- Percent increase and decrease
- Adding and subtracting signed numbers
- Profit, cost, and taxes
- Word problems with signed numbers · Useful idea
A net worth statement adds assets and subtracts debts, which are signed amounts.
- Fluent decimal arithmetic · Useful idea
Payroll and property tax work multiply and divide decimal amounts.
- Adding and subtracting within 1,000 · Useful idea
A net worth statement adds assets and subtracts debts in the thousands.
Leads to
- Building an exponential model · See it applied
Compound interest on a loan or savings is an exponential model with a growth factor each period.
- Piecewise and absolute-value functions · See it applied
Tax owed as a function of income uses a different rule on each bracket. That is a piecewise function whose pieces join where the brackets meet.
- Comparing uncertain strategies · See it applied
Choosing between incentives or plans compares expected values, which is a decision strategy.
Related skills
- Laws of exponents · Shared foundations
- Median and spread of signed data · Shared foundations
- Multiplying and dividing signed numbers · Shared foundations
- Solving two-step equations · Shared foundations
Open the interactive map to explore lessons and skill connections.