Use this worksheet as a warm up activity for your maths lesson. It would even make a great independent rotation activity during group work time. Developing a sound understanding of number sense is a fundamental part of the Australian National Curriculum (Recognise, model, read, write and order numbers to at least 100 - modelling numbers with a range of material and images). This resource includes a range of levelled worksheets, allowing you to differentiate for the varying abilities in your class.