This resource provides students with the opportunity to demonstrate their understanding of addition and subtraction concepts through mathematical modelling. They are required to interpret additive word problems, write a matching number sentence, complete a part-part-whole diagram and bar model that represent the problem and show their working out. Each page includes a list of strategies to assist students during the problem-solving process.

In order for the students to complete this task, they must recognise which part of the problem is unknown: the part or the whole. To avoid confusion, it is recommended that students are modelled examples of both types of problems and have access to hands-on materials, such as counters, to assist them in their working out.

Worksheets 1 and 2 include problems with two-digit numbers, while Worksheets 3 and 4 include three-digit numbers and are better suited to students who can extend their problem-solving skills further.