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StudyWithMe

  • 3 years ago

10/21 Multiplied By 3/5 Please Show Me How You Got It.

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  1. kymber
    • 3 years ago
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    |dw:1351874545481:dw|

  2. StudyWithMe
    • 3 years ago
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    7th Grade Math Btw XD

  3. kymber
    • 3 years ago
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    You just multiply like that.. and reduce it if possible. Got it?

  4. phi
    • 3 years ago
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    kymber told you the rule: multiply top times top and bottom times bottom

  5. StudyWithMe
    • 3 years ago
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    Ohh Okay Thanks XD

  6. phi
    • 3 years ago
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    But you can do "canceling" which makes the problem easier notice that \[ \frac{10}{21} \cdot \frac{3}{5} = \frac{10\cdot 3}{21 \cdot 5} \] but you know (right?) that 10 * 3 is the same as 3*10, so you could write this as \[ \frac{3\cdot 10}{21 \cdot 5} = \frac{3}{21} \cdot \frac{10}{5}\] you can divide top and bottom by 3 to simplify 3/21 to 1/7 and simplify 10/5= 2 so the problem is \[ \frac{1}{7}\cdot \frac{2}{1} = \frac{2}{7} \]

  7. StudyWithMe
    • 3 years ago
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    Thank You Alot Hes Asking For Canceling So Yep I Got It Right Thanks

  8. StudyWithMe
    • 3 years ago
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    \[\frac{ 3 }{ 4}\times \frac{ 7 }{ 9 }\]

  9. StudyWithMe
    • 3 years ago
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  10. phi
    • 3 years ago
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    you should make this a new post.

  11. StudyWithMe
    • 3 years ago
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    OKay Thanks.

  12. phi
    • 3 years ago
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    but 3/9 is 1/3 so 3/4 x 7/9 is the same as 3/9 x 7/4 = 1/3 x 7/4

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