Recording my strategies
| Grade | Work Samples |
|---|---|
| End of Stage 2 (end of Year 4) | |
| Grade A | Lee Sam |
| Grade B | Kim |
| Grade C | Courtney |
| Grade D | Cameron Jessie Terry Pat |
| Grade E | Casey |
Foundation Statement strands
The following strands are covered in this activity:
Description of activity
Students solve addition and subtraction problems and record their strategies.
- Students solve the following problem mentally and then record the strategy they used.
- Students repeat the process for the following problems:
34 + 17
73 – 25
63 + 29
162 – 69
The suggested time allocation for this activity is 30 minutes.
Suggested materials
Blank paper, pens
Prior learning
Students have had practice discussing and recording a variety of strategies for mental computations.
Board of Studies NSW, Mathematics K–6 Syllabus, pp 44, 49–50
Board of Studies NSW, Mathematics K–6 Sample Units of Work, p 88
Outcomes
Whole Numbers (NS2.1)
Counts, orders, reads and records numbers up to four digits
Addition & Subtraction (NS2.2)
Uses mental and written strategies for addition and subtraction involving two-, three- and four-digit numbers
Questioning (WMS2.1)
Asks questions that could be explored using mathematics in relation to Stage 2 content
Applying Strategies (WMS2.2)
Selects and uses appropriate mental or written strategies, or technology, to solve problems
Reasoning (WMS2.4)
Checks the accuracy of a statement and explains the reasoning used
Criteria for assessing learning
Students will be assessed on their ability to:
- use appropriate mental strategies to solve addition and subtraction problems
- explain their reasoning using mathematical terminology