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In complete sentences, explain the following: 1. Is 700 a good estimate for the sum of 435 and 368? 2. If it is, explain why it is a good estimate. If it is not explain why it is a bad estimate.
1. No 2. Because if you round 435 to the first digit 4 which is the 100s then it gets you 400 because it rounds down. Then you have to round 368 to it’s first digit 4 which is also the 100s, that gets you 400 because you round up. 400+400=800
700 is not a good estimate. This is because 400 + 300 is already 700, and 30 + 60 is 90. 700 + 90 is much more closer to 800 than 700, so 700 is a bad estimate.
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