Addition and Subtraction

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Adapted from Wynn, 1992
  • Cardinality
    is the concept that, when counting objects, the last number represents the total number of objects in the set
    includes size, length, height, weight, volume, distance, and time
    Number and operations
    refers to a set of math concepts related to understanding and representing numbers and operations (e.g., addition, subtraction, multiplication, and division) and the relationships between them
    is the ability to understand and reason with numbers
    One-to-one correspondence
    refers to matching one object to each number word when counting
    refers to the ability to identify the number of objects in a small group of objects without counting them
    is offering the right level of support to help a child achieve more than they would be able to on their own