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anaerrez

  • one year ago

Estimate the sum of 9.327 + 5.132 to one decimal place.

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  1. mathmate
    • one year ago
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    For an estimation, you could truncate to 1 decimal place and add: 9.3+5.1=14.4 To get a better estimate, add the second decimal place, if it is 5 or more, then round up the estimate. Second decimal place = 2+3=5 >=5, so round up 14.4 to 14.5.

  2. zaynahf
    • one year ago
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    |dw:1358009519474:dw|

  3. anaerrez
    • one year ago
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    I got 14.459

  4. anaerrez
    • one year ago
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    Did I get it right ? :-)

  5. zaynahf
    • one year ago
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    Yep! Now you just neeed to round up until you get to the last decimal place. What do you think the 5 could be rounded to? up to 6, or down to stay at 5?

  6. anaerrez
    • one year ago
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    6?

  7. zaynahf
    • one year ago
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    Good, now you have 14.46, what can that be rounded to?

  8. anaerrez
    • one year ago
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    Uummm 14.50?? :-P

  9. zaynahf
    • one year ago
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    Yes, but you do not need the 0 after the 5, since you want it to be only one decimal place. This way, you will have 14.5, your answer

  10. anaerrez
    • one year ago
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    Thank you sooo much

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