Rounding, Changing a number to a nearby number that is easier to work with, based on place value., Estimate, A number close to the exact answer that helps you quickly judge about how much or how many., Place Value, The value of a digit based on its position in a number (ones, tens, hundreds, etc.)., Compatible Numbers, Numbers that are easy to work with mentally and help make estimating quicker and simpler., Upper Estimate, An estimate that is slightly higher than the exact answer., Lower Estimate, A small number that tells how many times a base is multiplied by itself.

Rounding/Estimate

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