anonymous
  • anonymous
Estimate the sum of 9.327 + 5.132 to one decimal place.
Pre-Algebra
jamiebookeater
  • jamiebookeater
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mathmate
  • mathmate
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.
anonymous
  • anonymous
|dw:1358009519474:dw|
anonymous
  • anonymous
I got 14.459

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anonymous
  • anonymous
Did I get it right ? :-)
anonymous
  • anonymous
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?
anonymous
  • anonymous
6?
anonymous
  • anonymous
Good, now you have 14.46, what can that be rounded to?
anonymous
  • anonymous
Uummm 14.50?? :-P
anonymous
  • anonymous
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
anonymous
  • anonymous
Thank you sooo much

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