Factors and Multiples- Explanation

https://docs.google.com/presentation/d/1miFHXjodXsqZt3lXmTZursYdB8zEYsom/edit#slide=id.p20{...}

Problem-solving Modelling numbers Show base 10 place-value pieces: flats (100), longs (10) and units (1). Include blocks (1000) if students{...}

  http://nrich.maths.org/2004 Trebling Age 7 to 11 Challenge Level Can you replace the letters with numbers? Is there only one{...}