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Reteach: Factors (Prime & Composite).


Guided Practice

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Independent Practice: Factors (Prime & Composite)Use what you have learned about factors to determine whether each number is a prime number, or a composite number. 

a. 22 
1 x 22 = 22 2 x 11 = 22

Prime or composite? Composite

b. 19 
1 x 19 = 19

Prime or composite? Prime

c. 11 
1 x 11 = 11

Prime or composite? Prime

d. 25 
1 x 25 = 25 5 x 5 = 25

Prime or composite? Composite

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Independent Practice: Factors (Prime & Composite)Use what you have learned about factors to determine whether each number is a prime number, or a composite number. 

e. 28 
1 x 28 = 28 2 x 14 = 28 4 x 7 = 28

Prime or composite? Composite

f. 40 
1 x 40 = 40 2 x 20 = 40 4 x 10 = 40 5 x 8 = 40 
Prime or composite? Composite

g. 23 
1 x 23 = 23

Prime or composite? Prime

h. 8 
1 x 8 = 8 2 x 4 = 8

Prime or composite? Composite

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The various resources listed below are aligned to the same standard, (4OA04) taken from the CCSM (Common Core Standards For Mathematics) as the Factors and multiples Worksheet shown above.
Find all factor pairs for a whole number in the range 1 to 100. Recognize that a whole number is a multiple of each of its factors. Determine whether a given whole number in the range 1 to 100 is a multiple of a given onedigit number. Determine whether a given whole number in the range 1 to 100 is prime or composite.