Access Point #: MAFS.1.OA.2.AP.4aArchived Access Point

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Recognize subtraction as the inverse of addition.
Clarifications:

Essential Understandings

Concrete:

  • Make a set of objects.
  • Add “more” to a set.
  • Count to find the sum.
  • Take away the set that was added to the original set to show that subtraction is the opposite of addition. (Ex: 8 red counters + 2 blue counters = 10 counters; 10 counters – 2 blue counters = 8 red counters).
Representation:
  • Make a set of visuals.
  • Add “more” to a set of visuals.
  • Count to find the sum.
  • Take away the set of visuals that was added to the original set to show that subtraction is the opposite of addition.
  • Identify pairs of equations that identify subtraction as the inverse of addition (e.g., match 2 + 6 = 8 with 8 – 6 = 2).
General Information
Number: MAFS.1.OA.2.AP.4a
Category: Access Points
Cluster: Understand and apply properties of operations and the relationship between addition and subtraction. (Major Cluster) : 

Clusters should not be sorted from Major to Supporting and then taught in that order. To do so would strip the coherence of the mathematical ideas and miss the opportunity to enhance the major work of the grade with the supporting clusters.

Related Standards

This access point is an alternate version of the following benchmark(s).

Related Courses

This access point is part of these courses.
5012030: Mathematics - Grade One
7712020: Access Mathematics Grade 1
5012005: Foundational Skills in Mathematics K-2

Related Resources

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