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Fractions

Fractions. Multiples & Least Common Denominators. By Rosi Barron. <--- To Teacher Page. Fifth Grade Fractions: Multiples & Least Common Denominators Tips: -Teachers, please read through the whole presentation prior to the activity.

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Fractions

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  1. Fractions Multiples & Least Common Denominators By Rosi Barron <--- To Teacher Page

  2. Fifth Grade Fractions: Multiples & Least Common Denominators • Tips: • -Teachers, please read through the whole presentation prior to the activity. • -Each activity is meant to be used in addition to your classroom teaching. • -Each activity includes a journal component. • OBJECTIVE: • TSW list multiples to utilize fractions with Least Common Denominators. TEACHER PAGE

  3. LCD (Least Common Denominator) is the smallest common multiple of two or more denominators. EXAMPLE: The LCD for 1 and 5 is 12. 4 6 Follow these steps: Step 1: Find the common multiples of your denominators. 4: 4x1=4 4x2=8 4x3=12 4x4=16 4x5=20 4x6=24 4x7=28 6: 6x1=6 6x2=12 6x3=18 6x4=24 6x5=30 6x6=36 6x7=42 What is the smallest common multiple OR the least common multiple, the LCM? Click here to find out---->

  4. Is this what you chose? Step 1: Find the common multiples of your denominators. 4: 4x1=4 4x2=8 4x3=12 4x4=16 4x5=20 4x6=24 4x7=28 6: 6x1=6 6x2=12 6x3=18 6x4=24 6x5=30 6x6=36 6x7=42 YOU ARE CORRECT! Click here to go to step 2 ------>

  5. Step 2: Use the least common multiple as the least common denominator, or LCD. 1 x = 1 x = 6 x = 12 (LCD) 6 x 2 = 12 (LCD) 3 x = 3 x = 4 x = 12 (LCD) 4 x 3 = 12 (LCD) 1 x 2 = 2 1 2 6 x 2 = 12 6 12 (LCD) 3 x 3 = 9 3 9 4 x 3 = 12 4 12 (LCD) Fill in the blanks-----> = = Click here to see what you can do now ----->

  6. Compare: 1/6 = OR < OR > 3/4 with LCD 1/6 = 2/12 and 3/4 = 9/12 2/12 < 9/12 YOU CAN Add: 1/6 + 3/4 = ___ with LCD 1/6 = 2/12 and 3/4 = 9/12 2/12 + 9/12 =11/12 Journal what you just reviewed ---->

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