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anonymous

  • one year ago

I Will Medal And Fan Best Answer! I need explanation AND answer! Add. 3/4 + 3/10 Write your answer as a fraction in simplest form.

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  1. anonymous
    • one year ago
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    21

  2. anonymous
    • one year ago
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    21?

  3. anonymous
    • one year ago
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    just kidding im just messing around

  4. anonymous
    • one year ago
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    -_-

  5. ccswims
    • one year ago
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    you must find the common denominator between 10 and 4

  6. anonymous
    • one year ago
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    i know what to do, just not good at knowing how

  7. ccswims
    • one year ago
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    ok, the common denominator is 20, because 10 can go into 20, and 4 can go into 20

  8. ccswims
    • one year ago
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    but you cant just leave it as 3/20. for 3/4 you multiplied 5*4 to get 20. so now you must multiply 3*5 also

  9. ccswims
    • one year ago
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    what you do to the denominator you must ALWAYS do to the numerator

  10. ccswims
    • one year ago
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    so now you have 15/20, correct? because 3/5 = 15 and 4/5 = 20

  11. anonymous
    • one year ago
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    i don't get that last part

  12. ccswims
    • one year ago
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    now you must do the same to 3/10, except this time you multiplied it by two because 10*2 = 20. so now, instead of multiplying 3*5, you are going to multiply 3*2

  13. ccswims
    • one year ago
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    ok, so you need help more on the last part? ok, so when you go to find the common denominator, you have to multiply the same number you multiplied on the bottom, to the top.

  14. ccswims
    • one year ago
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    so, for example, if i wanted the common denominator to be 10, and we had the fraction 2/5, you would multiply 5*2 to get 10 right?

  15. ccswims
    • one year ago
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    well, you must also multiply 2 to the numerator (2*2) because you did that to the denominator

  16. ccswims
    • one year ago
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    get it?

  17. ccswims
    • one year ago
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    so basically, whatever you do to the bottom you must also do to the top.

  18. ccswims
    • one year ago
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    ok, so now do what we did with 3/4 (and remember we got 15/20) now do it with 3/10

  19. anonymous
    • one year ago
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    i don't get most of that........

  20. anonymous
    • one year ago
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    Sorry, i'm stupid

  21. ccswims
    • one year ago
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    your not stupid, this certain part just may not be your strong suit, for instance my weak part in math is angle proofs and parabolas and postulates. you'll get it tho. tell me where you exactly start to drop. where exactly do you not understand?

  22. anonymous
    • one year ago
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    I don't understand MOST math. This is when i lost: so now you have 15/20, correct? because 3/5 = 15 and 4/5 = 20

  23. ccswims
    • one year ago
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    you arent dividing. its not 3/5, its 3 * 5. ok, what doesnt make sense to you during that part? why i multiplied the number outcome? Like, do you know why i multiplied 3 * 5 and 4 * 5?

  24. anonymous
    • one year ago
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    no

  25. ccswims
    • one year ago
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    ok, we need to get the common denominator because you cannot currently add 3/4 + 3/10 because the denominators are different

  26. ccswims
    • one year ago
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    20 is the least common denominator we can use.

  27. ccswims
    • one year ago
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    do you know why i picked 20?

  28. anonymous
    • one year ago
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    no

  29. ccswims
    • one year ago
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    ok, i picked 20 because both 4 and 10 can go into 20, right?

  30. anonymous
    • one year ago
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    yes

  31. ccswims
    • one year ago
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    ok, how do we multiply 4 to 20

  32. ccswims
    • one year ago
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    what number multiplies with 4 to get 20?

  33. anonymous
    • one year ago
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    5

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