Stage: 2 Challenge Level: 
Try working backwards:
What fraction of the total time for the cinema and shopping is the
$10$ minutes of shopping?
So how long did they spend in total watching the film and
shopping?
Continue like this....
Working systematically. Calculating with ratio & proportion. smartphone. Factors and multiples. Calculating with fractions. Generalising. Fractions. Multiplication & division. Addition & subtraction. Algebraic fractions.
Published March 2002,April 2002.
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