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Factor each expression completely. Complete as many problems as you can in the time given. Each question is marked either correct or incorrect. Factor out the GCF. 1. 15x2 + 10 2. 4a + 18 3. x2 2– 100x 4. 2x – 24x Factor using DOTS. If prime, write “Prime.” 5. x2 – 49 26. 16x + 25 7. 81x2 – 16 8. 4x2 – 1 9. 2x + 100 10. 9x2 – 25y2
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Preview and Download !Greatest common factor (GCF) is also known as greatest common divisor (G.C.D) and highest common factor (HCF). Finding the GCF using Prime factorization: 1. List the prime factors for each number. 2. Find the Prime Factors they have in common. 3. Multiply the factors common to both numbers and the answer is GCF. 4. If there are no common prime ...
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Preview and Download !The first step in factoring always begins by checking if there is a greatest common factor. Example: Multiply the term using distribution. 2x(3x2 5) 6x3 10x “Think about working the problem in reverse, in other words factor out the GCF.” Example: Factor 6x3 10x The greatest term that divides into both is 2x. 2x 2x 6x 10x 2x
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Preview and Download !Greatest common factor (GCF) Grade 5 Factoring Worksheet Find the greatest common factor of the two numbers shown. 1. 16 22 2. 11 22 3. 7 21 4. 4 14 5. 10 40 6. 5 50 7. 7 49 8. 3 24 9. 22 44 10. 42 21
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Preview and Download !The highest common factor (HCF) of the two numbers is 3. Both numbers are less than 15. Write down two possible numbers that Olivia could be thinking of. Question 5: Niamh thinks of two numbers. The highest common factor (HCF) of the two numbers is 8. The lowest common multiple (LCM) of the two numbers is a multiple of 5.
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Preview and Download !Printable Math Worksheets @ www.mathworksheets4kids.com Name : Greatest Common Factor Answer key Find the greatest common factor for each pair of numbers. 1) 4, 8 Factors of 4 = Factors of 8 = GCF(4, 8) = 2) 12, 20 Factors of 12 = Factors of 20 = GCF(12, 20) = 3) 21, 3 Factors of 21 =
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Preview and Download !Greatest common factor (GCF) Grade 5 Factoring Worksheet Find the greatest common factor of the two numbers shown. 1. 30 27 2. 22 6 3. 11 33 4. 27 9 5. 22 11 6. 45 3 7. 7 35 8. 12 3 9. 32 48 10. 45 30
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Preview and Download !Find the factors. Circle the common factors. 32: 64: The GCF is 12: 44: 15: 12, 24 The GCF is 54: 72: 18: The GCF is 35: 80: The GCF is Find the factors. Write the GCF. Circle the common factors. Write the greatest common factor (GCF).
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Preview and Download !Super Teacher Worksheets - www.superteacherworksheets.com 2. 3. 4. Greatest Common Factor Greatest Common Factor Greatest Common Factor Greatest Common Factor Find the GCF of 16 and 24. Find the GCF of 92 and 20. Find the GCF of 100 and 250. Aiden is making sandwiches for a picnic. He has 72 turkey slices
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Preview and Download !• The Greatest Common Factor (GCF) (also called Greatest Common Divisor) of two or more numbers is the greatest number that is a common factor of the given numbers. For example, the GCF of 8, 24 and 20 is 4, because the factors of 8 are 1,2,4,8. 1,2 and 4 are also factors of 24 and ... many more in the GCF and LCD worksheets). 61. 16 62. 60 ...
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