• Summary
  • Contents
  • Subject index

‘What a super book! It is absolutely packed with practical ideas and activities to help you love maths, and love teaching and/or learning it. It certainly helps to develop an enthusiasm for a subject most adults tend to say “I'm no good at…”’

Calculation
Calculation
Andrew Harris
Different Forms of Addition and Subtraction

To appreciate the complexities of addition and subtraction we need to recognise that there are different forms of each which children experience. Carpenter and Moser (1983) identified four different types of addition and subtraction contexts: combine, change, compare and equalise (see Figure 10.1). Models and typical word problems are provided to illustrate each form.

Figure 10.1Forms of Addition and Subtraction (for 3 + 2 = 5 and 5 − 2 = 3)

The ...

  • Loading...
locked icon

Sign in to access this content

Get a 30 day FREE TRIAL

  • Watch videos from a variety of sources bringing classroom topics to life
  • Read modern, diverse business cases
  • Explore hundreds of books and reference titles