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anonymous

  • 5 years ago

5/-8 + -6/5???? HELP!!

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  1. dumbcow
    • 5 years ago
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    find the common denominator...just like you've done before

  2. anonymous
    • 5 years ago
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    i dont know how to find the common denominator

  3. anonymous
    • 5 years ago
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    :(

  4. dumbcow
    • 5 years ago
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    its the LCM of 8 and 5

  5. anonymous
    • 5 years ago
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    how do u find the LCM?

  6. dumbcow
    • 5 years ago
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    8+8+8+8+8 5+5+5+5+5 when do they meet?

  7. anonymous
    • 5 years ago
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    7

  8. anonymous
    • 5 years ago
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    ??

  9. anonymous
    • 5 years ago
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    now what do i do with it??

  10. dumbcow
    • 5 years ago
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    8+8=16+8=24+8=32+8=40 5+5=10+5=15+5=20+5=25+5=30+5=40 they meet at 40 or 8*5 that is now our new denominator, but we have to change numerators so they are equivalent -5/8 = -25/40 i multiplied both top and bottom by 5 -6/5 = -48/40 multiply top and bottom by 8

  11. dumbcow
    • 5 years ago
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    once you have the new fractions with same denominator just add the top numbers -25 + -48 = -73 = -73/40

  12. anonymous
    • 5 years ago
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    ohhh okk

  13. anonymous
    • 5 years ago
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    that was right! ok last one!

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  14. dumbcow
    • 5 years ago
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    if you have to just multiply the bottom numbers, that will always give you a common denominator

  15. dumbcow
    • 5 years ago
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    always look for 2 neg signs next to each other, they cancel each out do this first

  16. dumbcow
    • 5 years ago
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    do you want an explanation or just the answer

  17. dumbcow
    • 5 years ago
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    61/18

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