Standard Description of 4.NF.3.b: Decompose a fraction into a sum of fractions with the same denominator in more than one way, recording each decomposition by an equation. Justify decompositions, e.g., by using a visual fraction model. Examples: 3/8 = 1/8 + 1/8 + 1/8 ; 3/8 = 1/8 + 2/8 ; 2 1/8 = 1 + 1 + 1/8 = 8/8 + 8/8 + 1/8.
Standards preceding 4.NF.3.b are 3.NF.1, 3.NF.2. Standards that are taught after students master 4.NF.3.b are 5.NF.1. The Lumos Coherence map for 4.NF.3.b includes standards correlations, description and a list of apps, questions, videos, books and other resources related to 4.NF.3.b