At a mountain shelter, Emek and Luna prepared food for hikers arriving from two nearby trails. The signs estimated 2,486 hikers from one route and 1,721 from the other. To plan quickly, they rounded each number to the nearest thousand. Emek rounded 2,486 to 2,000, and Luna rounded 1,721 to 2,000. Their estimate was about 4,000 hikers altogether. Using this estimate, they prepared supplies for about 4,000 people and had everything ready before the hikers arrived.
Challenges
Challenge 1 of 5
Challenges
Challenge 1 of 4
Hint
Think about the halfway point between 2,000 and 3,000.
Emek rounded 2,486 hikers to 2,000 to the nearest thousand. How can he check that his rounding is correct?
2,486 is closer to 3,000 than to 2,000.2,486 is less than 2,500, so it is closer to 2,000 than to 3,000.Every number beginning with 2 rounds to 2,000.2,486 is greater than 2,000, so it must round to 3,000.Correct! 2,486 is below 2,500, so it rounds to 2,000.
Try again. Compare 2,486 with the halfway point between 2,000 and 3,000.
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Hint
Add 2,486 and 1,721.
The two trail signs estimate 2,486 hikers and 1,721 hikers. How many hikers are there altogether before rounding?
Correct! The two signs show 4,207 hikers altogether.
Try again. Add the two numbers carefully by place value.
Next🎉 Congrats! You got this question!
Hint
Compare the estimate of 4,000 with the exact total from the two trail signs.
Luna says their estimate of 4,000 hikers is greater than the exact total. Is she correct?
Yes, because 4,000 is greater than 4,207.Yes, because estimates are always greater than exact totals.No, because 4,000 is less than the exact total of 4,207.No, because the exact total is 3,207.Correct! 4,000 is less than 4,207, so the estimate is lower than the exact total.
Try again. Compare 4,000 and 4,207 carefully.
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🎉 Congrats! You finished this challenge set!
