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Fractions

This comprehensive presentation by Rosi Barron is designed for fifth-grade teachers to help students master fractions and least common denominators (LCD). The material includes activities, journal components, and step-by-step instructions for identifying multiples. Educators are encouraged to review the entire presentation before implementing it in class. By the end, students will list multiples and apply them to find the LCD, reinforcing their understanding of how to work with fractions.

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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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