Math Vocabulary Common Denominator – “CD”: The same bottom #s of a fraction [needed to compare, *ADD & SUBTRACT] (find by finding LCM)  LCM = LCD LCD.

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Presentation transcript:

Math Vocabulary Common Denominator – “CD”: The same bottom #s of a fraction [needed to compare, *ADD & SUBTRACT] (find by finding LCM)  LCM = LCD LCD – Lowest Common Denominator: FIRST / LOWEST bottom #s in common

Finding Common Denominators “CD”s Reminder: LCM = LCD Steps: 1) Find the LCD (=LCM) of given bottom #s [denominators] 2) Make [new] equivalent/equal fractions… Find the Common Denominator (CD) CD =

More practice w/ finding CDs Things to remember: *LCM = LCD 1) Find LCD 2) Make [new] equal fractions Write equivalent fractions for: CD =

EXAMPLES Compare >, <, =: CD = Compare >, <, =: CD =

Practice… a) Find the Common Denominator (CD) ONLY of 3 and 4 5 6CD = b) Write equivalent fractions for 1 and c) Compare >, <, =