Debt recovery
Tony and Tina can't work out which of them owes what to the other. Can you?
Age
11 to 14
Challenge level
Problem
Tony owes Tina 40p.
Then Tina borrows 50p from Tony.
Later Tony lends Tina 60p.
Who has to pay what to whom to square things up?
Student Solutions
Answer: Tina owes Tony 70p.
Adding up as you go along
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Adding up at the end
+ for money you are owed, - for money you owe
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