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6.2
Fractions Test Review
Term | Definition |
---|---|
reciprocal | any two numbers whose product is 1. Flip a fraction |
divide a fraction | multiply by its reciprocal (KCF- keep, change, flip) |
mixed number | a number with a whole number and fraction |
improper fraction | a fraction where the numerator (top) is larger (or equal) than the denominator (bottom) |
dividing mixed numbers | change into improper fraction, then multiply by the reciprocal (KCF) |
change a mixed number into an improper fraction | Numerator (top): multiply the whole number by the denominator and add the numerator Denominator: stays the same |
scale up | Multiply the numerator and denominator by the same number (to make a common denominator) |
multiply fractions | Multiply numerators and denominators Cross cancel OR simplify if necessary |
simplify a fraction | Divide both the top and bottom of the fraction by the Greatest Common Factor. Example: Simplify the fraction 8/12 : 1. The largest number that goes exactly into both 8 and 12 is 4, so the Greatest Common Factor is 4. |
cross cancel | Simplifying BEFORE you multiply the fractions together. You must do this diagonally, by dividing the numerator and denominator by the same number. |
Multiply Mixed Numbers | Change them into improper Fractions, then use the rules for Multiplying Fractions |
Find the missing side when given the area and one side | Divide the area by the given side Ex. Area = 50, Length = 5 What is the width? 50/5 = 10 |