# Sec-13 - o Find a least common denominator using method for...

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Math 1300 Section 1.3 Notes 1 GCF (Greatest Common Factor) 1.) Write each of the given numbers as a product of prime factors. 2.) The GCF of two or more numbers is the product of all prime factors common to every number. Examples: 1. Find the GCF of 24 and 32. 2. Find the GCF of 15 and 27. 3. Find the GCD of 27, 18, and 45.

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Math 1300 Section 1.3 Notes 2 LCM (Least Common Multiple) 1.) Write each of the given numbers as a product of prime factors. 2.) Take the greatest power on each prime and multiply them. Examples: 1. Find the LCM of 15 and 27: 2. Find the LCM of 18 and 36. 3. Find the LCM of 15, 18, and 36.
Math 1300 Section 1.3 Notes 3 Adding and Subtracting Fractions:

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Unformatted text preview: o Find a least common denominator using method for LCM o Change the numerators of each fraction o Add or subtract the numerators (keep denominator unchanged) o Reduce Examples: 1. = + 27 2 18 7 2. = + 27 1 15 11 Math 1300 Section 1.3 Notes 4 Multiplying and Dividing Fractions: o Simplify the fractions if not in lowest terms. o Multiply the numerators of the fractions to get the new numerator. o Multiply the denominators of the fractions to get the new denominator. Examples: 1. 3 2 5 1 × 2. = × 3 2 8 5 Dividing Fractions: o Multiply the first fraction by the reciprocal of the second Examples: 1. = ÷ 7 6 2 3 2. = ÷ 8 9 4...
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Sec-13 - o Find a least common denominator using method for...

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