Rounding
Mathematics, Grade 5
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Study Guide Rounding Mathematics, Grade 5
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ROUNDING What is Rounding? • Rounding makes numbers that are easier to work with in your head. • Rounded numbers are only approximate. • An exact answer generally cannot be obtained using rounded numbers. • Use rounding to get an answer that is close but that does not have to be exact. Rounding whole numbers 1. Determine what your rounding digit is and look to the right side of it. If the digit is 0,1,2,3 or 4 do not change the rounding digit. All digits that are on the right hand side of the requested rounding digit will become 0. 2. Determine what your rounding digit is and look to the right of it. If the digit is 5,6,7, 8 or 9, your rounding digit rounds up by one number. All digits that are on the right hand side of the requested rounding digit will become 0. Rounding Decimals When rounding numbers involving decimals, there are 2 rules to remember: 1. Determine what your rounding digit is and look to the right side of it. If that digit is 4,3, 2 or 1, simply drop all digits to the right of it. 2. Determine what your rounding digit is and look to the right side of it. If that digit is 5, 6, 7, 8 or 9 add one to the rounding digit and drop all digits to the right of it. © Copyright NewPath Learning. All Rights Reserved. Permission is granted for the purchaser to print copies for non-commercial educational purposes only. Visit us at www.NewPathLearning.com.
Example: 765.3682 becomes: 1000 when rounded to the nearest thousand (1000) 800 when rounded to the nearest hundred (100) 770 when rounded to the nearest ten (10) 765 when rounded to the nearest one (1) 765.4 when rounded to the nearest tenth (10th) 765.37 when rounded to the nearest hundredth (100th.) 765.368 when rounded to the nearest thousandth (1000th) Try this! Round 3,489 to the nearest Hundred = _______________ Thousand = _______________ Ten = _______________ Round 125.78 to the nearest Tenths = _____________ One = _____________ Hundredths = _____________ © Copyright NewPath Learning. All Rights Reserved. Permission is granted for the purchaser to print copies for non-commercial educational purposes only. Visit us at www.NewPathLearning.com.
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