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28Tylerr Group Title

Find the additive and multipliactive inverse for each number: 3A. 1.25

  • one year ago
  • one year ago

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  1. Shane_B Group Title
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    Do you know what additive and multiplicative inverse means? We can start there...

    • one year ago
  2. 28Tylerr Group Title
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    I know what it means a little bit but not much. We just started this in our Algerba II

    • one year ago
  3. Shane_B Group Title
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    Additive inverse is simply the number that when added to the other number equals 0. So \[1.25+? = 0\]

    • one year ago
  4. 28Tylerr Group Title
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    25 + 0 = 0? Is thar right?

    • one year ago
  5. 28Tylerr Group Title
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    That**

    • one year ago
  6. Shane_B Group Title
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    First, let me clear something up: "3A. 1.25" So the problem is 3A and the value given is 1.25 right?

    • one year ago
  7. 28Tylerr Group Title
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    Yepp

    • one year ago
  8. Shane_B Group Title
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    Ok...so what could you add to 1.25 which would result in a value of 0?

    • one year ago
  9. 28Tylerr Group Title
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    0?

    • one year ago
  10. Shane_B Group Title
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    1.25 + 0 = 1.25 That's not it :)

    • one year ago
  11. Shane_B Group Title
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    Since 1.25 is positive...you should see that you must add a negative number to make it 0. Therefore, the answer would be -1.25:\[1.25+(-1.25)=0\]That's a true equation.

    • one year ago
  12. 28Tylerr Group Title
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    Right so it would be a -1.25 as a answer?

    • one year ago
  13. Shane_B Group Title
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    Yes

    • one year ago
  14. 28Tylerr Group Title
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    Alright so basically just switching a positve to a negative answer.

    • one year ago
  15. Shane_B Group Title
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    Maybe... If you're original number was -1.25...the additive inverse would actually be +1.25

    • one year ago
  16. Shane_B Group Title
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    If you're ok with everything above...we can discuss multiplicative inverses

    • one year ago
  17. 28Tylerr Group Title
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    Yeah thats alright so for 3A it would be -1.25?

    • one year ago
  18. Shane_B Group Title
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    Yes, that's additive inverse answer.

    • one year ago
  19. Shane_B Group Title
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    You still need to do the multiplicative inverse also. Multiplicative inverse is simply defined as the number that when multiplied times the original number result in an answer of 1. In essence, it's going to be the reciprocal of the original value. \[(1.25)(\frac{1}{1.25})=1\]So the multiplicative inverse of 1.25 is 1/1.25. You could also express this (as well as the additive inverse as a fraction which may be what your teacher wants:\[1.25=\frac{5}{4}\]So the additive inverse would be :\[-\frac{5}{4}\] and the multiplicative inverse would be \[\frac{4}{5}\]

    • one year ago
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