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Estimate 3.99 as 4. The answer will be one less than 4 + 0.84

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โˆ™ 2016-10-12 19:26:27
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โˆ™ 2016-09-29 21:56:58

You cannot. 3.99 is 3.99 and no estimation is going to check that. Similarly with 0.84

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Q: How could you use estimation to check3.99 and 0.84?
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