About This Lesson
<p>Take any four digit number. Move the first digit to the ‘back of the queue’ and move the rest along. Now add your two numbers. What properties do your answers always have?</p><p>Other topics covered: Numbers</p>
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This is a great investigation which you could use when studying number or at the start of a unit on expressions and proof. The teachers notes on the webpage are very detailed and explain how you could run the investigation with a class. This activity is differentiated by outcome, some students will be able to explain the pattern whereas some may be able to prove it using algebra. Thank you for sharing.