Math

Kelly subtracted 2.3 from 20 and got 17.7. Explain why this is reasonable.

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  1. This is reasonable because 20 - 2 = 18.

    Think about it in terms of money. Your bill comes to $2.30. You give the clerk a $20 bill and she gives you $17 in bills plus some change.

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    Ms. Sue
  2. 20 - 2 = 18

    Subtracting .3 more gives you 17.7.

    I hope this helps. Thanks for asking.

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  3. WAtup

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  4. 17.7

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  5. It is reasonable because If you subtract 20 - 2 it is 18 and all it is doing is just adding a .3 to the 2 so it would just be subtracting 20 - 2.3 which is no difference and subtracting .3 more would give you the answer 17.7. hope that this gives you an A+ on your homework because I had this on my homework. My age is 10 and I run track,and actually I just won the JR. Olympics in Jacksonville, Florida.Also I was on the NEWS. My birthday is JAN.30,2005.I go to Deca-Prep.

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  6. 17.7

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  7. Were I ph 2 7

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  8. Because if you work it out on your paper and line up the decimals you will obviously get 17.7

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  9. ba

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  10. Lol

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  11. maybe this will help you.
    Im in the 5th grade. Im 11 years old.
    The answer is reasonable because if you subtract 20-2 you would 18. and subtracting 20-2.3 is just subtracting .3 and your answer would be 17.7 in decimals. as a whole number it would be 17 7/10 or 100.
    hope this will help you do your math homework because this site has helped me with my homework right now. thank you and hope someone will give me a thank you to help them with their homework.

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  12. Thank u

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  13. I am a genius beecus I spel thingz soooo rite.
    and Im NEBER EBER RONG

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  14. Dear Math genuis.
    I understand that you can spell things right. But I do not understand that you are a genuis. Because you are wrong am I am right.

    From, Katie
    6years old

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  15. All of theses didn't work

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  16. I got the same answer

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  17. if you have 2.3 and you take away the two tenths plus the three others in decimals you will theoretically you will have 17.7.

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  18. Why is everyone disliking random comments?

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  19. Wait ms sue answer in 2008

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  20. this answer is reasonable because 20–2=18.Think about it in terms of money.Your bill comes$2.30. You give the clerk a $ 20 bill and she give you$17 in bills plus change.Does it helps you

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  21. Thanks Lily that helped me a lot :)

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  22. Yes, Ms.Sue is correct and all the others who gave the same response as Ms.Sue.

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  23. That was so helpful thank you

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  24. Thank you very much for helping me with this math problem!! :)

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  25. did not help

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  26. Help me

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