NC.4.OA.4.a
Recognize that a whole number is a multiple of each of its factors.
Khan Academy ResourcesFactors and multiplesCommon denominatorsIdentify factorsIdentify multiplesRelate factors and multiplesMultiply 2-digit numbers with area modelsFactor pairsFinding common denominatorsFinding factors of a numberUnderstanding factor pairsIdentifying multiplesFactors and multiples: days of the weekReasoning about factors and multiplesFinding factors and multiplesCommon denominators: 1/4 and 5/6 Common denominators: 3/5 and 7/2

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