Cross-Topic Connections
📋 What it is
Money math links to percents, ratios, decimals and functions.
🗣️ Coach says
Financial maths reuses everything. Interest is a percent. A budget split is a ratio. Change is decimals. Savings over time is a function. Seeing these links means the money maths is maths you already know.
🧠 Memory hook
Interest = %. Budget split = ratio. Change = decimals. Money math is your maths, applied.
😂 Giggle
Why did the investor plant seeds?
To grow a diversified portfolio!
😲 Whoa!
Compound interest is an exponential function — the same maths as a folding paper or a spreading rumour.
✅ Quick check: Interest of 5% on savings uses which maths skill?
Say your answer out loud first — then reveal.
Percentages — 5% is a percent-of calculation.
Interest is a percentage applied to an amount.
🧪 Try it! (2 minutes)
Write a $20 savings-a-week plan as a function and predict your total after 5 weeks.