Fraction Review.pdf

Fraction Review A fraction consists of two numbers: a numerator (the top number) and a denominator (the bottom number). Numerator = number of parts Practice 1 6...

Fraction Review A fraction consists of two numbers: a numerator (the top number) and a denominator (the bottom number). Numerator = number of parts Practice 1 6 Simplify Denominator = number of parts that make a whole 30 1. 16 Simplifying Fractions Also called, reducing or writing the fraction in lowest terms 60 2. 75 A fraction is simplified if the numerator and denominator have no factors in common other than 1. Perform the indicated operation and simplify, if needed. To simplify a fraction divide both the numerator and denominator 1 7 3. by the largest number that will divide evenly into both. 7 18 Examples: 18 3 6 3 10 xy 2 5 x y 2x 4. 5 15 30 5 6 5 15 y 3 5 y 3 13 26 Multiplying Fractions 11 5 5. Multiply straight across, numerator times numerator and 14 14 denominator times denominator. Simplify, if possible. 2 6. 200 3 1 3 11 3 y 33 y 11y 3 11y 5 Examples: 4 5 20 24 5 120 40 3 40 9a 2 7. Dividing Fractions 10 5 Multiply the first fraction by the reciprocal (flip) of the second fraction. 2 5 8. 3y 6y 3 1 3 5 15 Examples: 4 5 4 1 4 1 3 9. 7 x 3y 3y 1 3y 3 y 3 5y3 4 4 5y3 20 y 3 20 y 2 y 20 y 2 2 8 10. 3 15 Adding or Subtracting Fractions DENOMINATORS must be the SAME to add or subtract fractions. 9 11. 5 Get a common denominator, if needed, then add or subtract the 10 numerators and keep the common denominator. Simplify, if possible. 7 1 12. 8 20 3 1 3 5 14 15 4 15 4 19 Examples: 4 5 4 5 5 4 20 20 20 20 Answers on back 7 1 7 12 7 2 7 2 5 8 4 8 4 2 8 8 8 8 Practice Answers 15 1. 8 4 2. 5 1 3. 18 2 4. 3 3 5. 7 6. 80 9a 4 7. 10 1 8. 6y x 21 9. 7x 16 10. 45 9 11. 50 37 12. 40