Money & Shopping
Math for spending, saving, and comparing prices
6 live exhibits. Each one already works. Change a number and see what happens.
Open as board Play with these together. Solving one grows related exhibits.
Systems of EquationsPhone plans: finding the break-even point
Two plans, two lines. Where they cross, the price is the same.
PercentSale price and tax: what you really pay
30% off, then tax on top. Percent math decides the number at the register.
Arithmetic & Number SenseRoad trip math: miles, liters, and dollars
Convert once and the trip adds up: how far, how much fuel, how much money.
GeometryPizza value: one large or two mediums?
Area grows with the square of the size. That changes which pizza is the deal.
Linear EquationsHourly pay and overtime: time-and-a-half
A straight line with a bend: after 40 hours, every hour pays more.
Exponents & LogarithmsCompound interest: money that grows on itself
Interest earns interest. Exponents explain why saving early wins.