Access Point #: MAFS.3.NF.1.AP.2a (Archived Access Point)


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Locate given common unit fractions (i.e., 1/2, 1/4) on a number line or ruler.

Clarifications:

Essential Understandings

Concrete:

  • Given a number line only representing 0-1, identify the distance from 0-1 as a whole.
  • Given a number line only representing 0-1, divided into two equal parts, identify each part as a half of the whole length. Identify the end location of the first part as 1/2.
  • Given a number line only representing 0-1, divided into three equal parts, identify each part as a third of the whole length. Identify the end location of the first part as 1/3.
  • Given a number line only representing 0-1, divided into four equal parts, identify each part as a quarter of the whole length. Identify the end location of the first part as 1/4.
  • Given a number line only representing 0-1, divided into eight equal parts, identify each part as an eighth of the whole length. Identify the end location of the first part as 1/8.

    number line examples
Representation:
  • Understand the following concepts, symbols, and vocabulary: equal parts, unit fraction, and number line.

Number: MAFS.3.NF.1.AP.2a Category: Access Points
Date Adopted or Revised: 06/14 Cluster: Develop understanding of fractions as numbers. (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

Name Description
MAFS.3.NF.1.2: Understand a fraction as a number on the number line; represent fractions on a number line diagram.
  1. Represent a fraction 1/b on a number line diagram by defining the interval from 0 to 1 as the whole and partitioning it into b equal parts. Recognize that each part has size 1/b and that the endpoint of the part based at 0 locates the number 1/b on the number line.
  2. Represent a fraction a/b on a number line diagram by marking off a lengths 1/b from 0. Recognize that the resulting interval has size a/b and that its endpoint locates the number a/b on the number line.



Related Courses

Name Description
5012050: Grade Three Mathematics
7712040: Access Mathematics Grade 3
5012055: Grade 3 Accelerated Mathematics
5012015: Foundational Skills in Mathematics 3-5