Subtraction in early primary

Subtraction

Q: Subtraction is

• one of the five ways we work with numbers
• an inverse operation of division
• one of the first mathematical tasks students are taught in school

Language of subtraction

Q: Payne and Rathmell Triangle

Label the triangle
• Language
• Symbol
• Model

Structural thinking

Q: Mathematics is built on

• patterns and structure
• problem solving

Model of subtraction

Q: Problem solving steps

• Understand the problem
• Plan a solution
• Carry out the plan
Sort Polya's problem solving steps in the correct order

• making correct calculations
• completing a number of steps
• selecting the correct mathematical operations to use

Subtraction strategies

Q: Match the strategy

• Mental strategy
compensate
• Written strategy
algorithm

Differentiation

Q: Maker model of differentiation

• Content
What students need to learn
• Process
How students learn
• Product
How students demonstrate what they know
• Learning environment
How learning is structured

Q: Mathematical literature

Mathematical literature

Resources

Q: Reflection

What strategies will you take back to your classroom?