Rounding and Estimating Rounding a whole number means approximating it. Section 1.4.

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Rounding and Estimating Rounding a whole number means approximating it. Section 1.4

23 rounded to the nearest ten is rounded to the nearest ten is rounded to the nearest ten is Martin-Gay, Prealgebra, 5ed

Rounding Whole Numbers to a Given Place Value Step 1. Locate the digit to the right of the given place value to be rounded. Step 2. If this digit is 5 or greater, add 1 to the digit in the given place value and replace each digit to its right by 0. Step 3. If this digit is less than 5, keep the digit in the given place value and replace each digit to its right by 0. 3 Martin-Gay, Prealgebra, 5ed

Making estimates is often the quickest way to solve real-life problems when their solutions do not need to be exact. 4 Martin-Gay, Prealgebra, 5ed

Helpful Hint Estimation is useful to check for incorrect answers when using a calculator. For example, pressing a key too hard may result in a double digit, while pressing a key too softly may result in the number not appearing in the display. 5 Martin-Gay, Prealgebra, 5ed

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