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Grade 4 - Operations and Algebraic Thinking
Standard 4.OA.B.4 - Practice divisibility rules from 1 to 9.
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.