4.OA.4
Find all factor pairs for a whole number in the range 1–100. Recognize that a whole number is a multiple of each of its factors. Determine whether a given whole number in the range 1–100 is a multiple of a given one-digit number. Determine whether a given whole number in the range 1–100 is prime or composite.
Khan Academy ResourcesPrime and composite numbers reviewFactors and multiplesPrime and composite numbers introIdentify prime numbersIdentify composite numbersIdentify factorsIdentify multiplesRelate factors and multiplesPrime and composite numbersFactor pairsRecognizing prime and composite numbersFinding factors of a numberPrime numbersUnderstanding factor pairsIdentifying multiplesReasoning about factors and multiplesFinding factors and multiples

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