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Mathematics: Number
Level indicator: Level 1i - Counting From One Level 1ii - Advanced Counting Level 2 - Early Additive Level 3 - Advanced Additive and Early Multiplicative Level 4 - Advanced Multiplicative Level 5 - Advanced Poportional

Number strategy

Early additive

 Number strategy progression
About the Exemplars
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What the work shows The learning context Where to next Curriculum links
What the work shows

The task

The teacher set the problem: "Billy has $25, and Sam has $9. How much more money than Sam has Billy got?" She asked the students to explain how they got their answer.

I said 25 take away 9. I took 5 away to get 20. Then I took another 4, and that's 16. Images of student problem solving process

Roimata's work shows that she is able to:

  • solve subtraction problems
  • derive an answer from known basic facts.

I said: 25 take away 9. I took away 10 'cos that's easy, and then I added 1 back on. That makes 16. Images of student problem solving process

Martin's work shows that he is able to:

  • solve subtraction problems
  • derive an answer from known basic facts.

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