4.OA.B.4
Find factor pairs for whole numbers in the range 1-100 using models. Recognize that a whole number is a multiple of each of its factors. Determine whether a given whole number is prime or composite and whether the given number is a multiple of a given one-digit number.
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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