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Ordering Journeys

Age 7 to 11
Challenge Level

What Distance?

Here are the distances (as the crow flies) in km from London to cities in the world.

Abu Dhabi 5480           Barcelona 1139               Cape Town 9680
Delhi 6718                   Edmonton 6805                Florence 1209          
Gothenburg 1039         Houston 7812                   Istanbul 2501
Jerusalem 3611             Karachi 6314                  Lauceston 17425

Sort out these journeys in order according to the distances involved.

Why do this problem?

This challenge gives pupils experience of comparing and ordering large numbers.

Possible approach

Try to say as little as possible when introducing this task. When the group or class has finished it would be good to discuss the different approaches that pupils used.

Key questions

Tell me what you first thought would be a good way of doing this.
Tell me about any difficulties you encountered when solving this challenge.

Possible extension

Although unrelated to the challenge you might like to make use of these maps to discuss why the 'straight' lines of the 'as the crow flies' are drawn as various curves.

Possible support

Some pupils may need help with focusing on each particular little map and the names that may be unusual for them. Since it's about addition and subtraction there may also be a need for some apparatus.