4.NOS.C: Gain familiarity with factors and multiples.

Gain familiarity with factors and multiples.

4.NOS.C.7Recall or quickly derive multiplication and division facts within 100 (e.g., factors less than or equal to 10 and quotients less than are equal to 10). a. Skip count (2s, 5s, 10s) and apply properties of operations (0s, 1s) to derive foundational facts. b. Derive unknown facts from known facts using double facts (e.g., to solve 4 × 3, double 3 to get 6 and double 6 to get 12) to multiply and divide. c. Use properties of operations (e.g., to solve 8 × 7, think of (5 × 7 + (3 × 7)) to multiply. d. Use the inverse relationship between multiplication and division (e.g., think of 4 × ? = 28 to solve 28 ÷ 4 = ?) to multiply and divide.4.NOS.C.8Explain and apply concepts of factors, multiples, and prime and composite numbers for whole numbers in the range of 1-100. a. Identify factor pairs for a whole number in the range of 1–100. b. Determine whether a given whole number in the range of 1–100 is a multiple of a one-digit number. c. Distinguish between factors and multiples and explain how they relate to a given number. d. Determine whether a given whole number in the range of 1–100 is prime, composite, or neither.

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