Access Point #: MAFS.2.NBT.2.AP.8aArchived Access Point

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Mentally add or subtract 10 from a given set from the tens family (e.g., What is 10 more than 50? What is 10 fewer than70?).
Clarifications:

Essential Understandings

Concrete:

  • Make a set of base ten blocks that represents a two-digit number that is multiple of 10.
  • Add or take away another set of base ten blocks that represents 10.
  • Recount the set to get a sum or difference.
Representation:
  • Make a visual representation of base ten blocks that represents a two-digit number that is multiple of 10.
  • Add or take away a visual representation of another set of base ten blocks that represents 10.
  • Recount the set to get a sum or difference.
  • Use a hundreds chart to count forwards or backwards by 10’s from any given two-digit number that is a multiple of 10.
  • Understand the following concepts and vocabulary of more, less.
General Information
Number: MAFS.2.NBT.2.AP.8a
Category: Access Points
Date Adopted or Revised: 06/14
Cluster: Use place value understanding and properties of operations to add and subtract. (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.
5012040: Mathematics - Grade Two
7712030: Access Mathematics Grade 2
5012005: Foundational Skills in Mathematics K-2

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