Progressions for the Common Core State Standards for MathematicsProgressions for the CCSSM: Number & Operation--Fractions in Grades 3-5

Description: One of a series of documents describing the progression of a topic across several grade levels, informed both by research on children's development and by the structure of mathematics. Grade 4 students learn a fundamental property of equivalent fractions: multiplying the numerator and denominator of a fraction by the same non-zero whole number results in a fraction that represents the same number as the original fraction.