### Work Sample : Bobby

• Grade Commentary

## At the grand final - Bobby : Grade Commentary

### Other Work Samples for:

Bobby has demonstrated an adequate level of competence in performing calculations with money. A range of addition, subtraction and multiplication strategies has been used but additional combinations to the value of ten dollars could have been provided. An incorrect answer to part b has been obtained using the subtraction algorithm but a sound understanding of the use of trading in subtraction has been demonstrated. To improve, Bobby should check solutions using inverse operations and use a systematic approach to determining all possible combinations. This work sample demonstrates characteristics of work typically produced by a student performing at grade C standard midway through Stage 3.

### Grade C

The student has a sound knowledge and understanding of the main areas of content and has achieved an adequate level of competence in the processes and skills.

Full list of grade descriptions

## Foundation Statement strands

The following strands are covered in this activity:

• Working Mathematically
Students ask questions and undertake investigations, selecting appropriate technological applications and problem-solving strategies. They use mathematical terminology and some conventions and they give valid reasons when comparing and selecting from possible solutions, making connections with existing knowledge and understanding.
• Number
Students read, write and order numbers of any size, selecting and applying appropriate mental, written or calculator strategies for the four operations. They compare, order and perform calculations with simple fractions, decimals and simple percentages and apply the four operations to money in real-life situations. Students place the likelihood of simple events in order on a number line from 0 to 1.