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← Multiply Fractions - Visualizing Algebra

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Showing Revision 3 created 05/24/2016 by Udacity Robot.

  1. If you said 1/12, nice work. This time,
    I'm going to use some blocks to help me
  2. out. This full block represents one candy
    bar. I'm going to go ahead and section the
  3. candy bar into fourths. Okay, I have 1/4,
    1/4, 1/4, and 1/4, all the fourths added
  4. together make up my whole candy bar. I
    have 1/4 of my candy bar here, but now I
  5. need 1/3 of it. I'm going to split this
    1/4 into 1/3. So, this piece right here
  6. represents 1/3 of 1/4 of my candy bar.
    Let's see how it compares to the original
  7. whole candy bar. I can see that the one
    piece is one out of the 12 pieces of my
  8. candy bar, so 1/3 of 1/4 must be 1/12. And
    you probably did it really easily. You
  9. probably just said 1/3 times 1/4.
    Remember, when we multiply fractions, we
  10. multiply the numerators straight across,
    and the denominators straight across. So,
  11. I have 1 times 1 and 3 times 4, or 1/12. This piece is
    1/12 of my original candy bar.