Video: Percentage decrease
Katie and Ben set off on a 'discount dash' to see who can scoop the best bargains. They compare purchases and explain how to calculate a percentage decrease.
Video: How banks make money
Jamie and Katie demonstrate the relationship between banks, savers and borrowers.
Video: Finding the original
Katie explains how to work out how much more of a product you are getting for your money.
Video: Tick or trash: calculating interest
In 'tick or trash', Jamie and Katie both tackle a question which involves performing an interest calculation over two years.
Currency, measurements and numbers
Pronunciation of numbers (American)
Fact Monster: Math
BBC Skillswise: Numbers
BBC Skillswise: Writing big numbers
BBC Skillswise: Percentages
BBC Skillswise: Temperature
BBC Skillswise: Distance
BBC Skillswise: Length, weight and capacity
BBC Skillswise: Volume
BBC Skillswise: Money
Time and date
BBC Skillswise: Timetables
BBC Skillswise: Reading times and dates
BBC Skillswise: Calculating time
Application of number (BBC)
Conversion calculator (Fact Monster)
Measuring units conversion table
Conversion & Calculation Center
Valutakalkulator (DnB Nor)