# Place Value: Number Sorting

Australian curriculum number (ACMNA013)

This sequence builds students’ understanding of place value of numbers up to at least 200. Through the tasks, students develop skills in identifying the value of digits in a number and also build correct terminology to sort and describe 1-digit, 2-digit and 3-digit numbers. The second task extends into using a Venn diagram to sort and describe numbers.

This sequence is for students who:

• can recognise, name and model numbers up to at least 200.
• understand early place value concepts, specifically that the place of a digit in a number gives its value.

These concepts will be built further through the explorations.

### Lesson 1: How Will You Sort

In this task, students are presented with a variety of one-, two- and three-digit numbers. They are asked to sort and then re-sort these numbers. Students participate in a gallery walk to look at the different ways that others in the class have sorted the same collection of numbers.

### Lesson 2: Groups Within Groups

Students sort numbers by using Venn diagrams to show commonalities between groups. Initially students are presented with some numbers already placed in Venn diagrams and are asked to rationalise the arrangement. They are then presented with a collection of numbers and are asked to use a Venn diagram to sort the numbers themselves.

Last updated February 22 2018.