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Mr. Rojas’ Third Grade Class School : Lee Britain Elementary 2006-2007. Topic : Rounding to Hundreds Students : Helen L.Vicky C. Andrea T.Gabriela G. Rounding. Rounding is the process of changing some digits to zeros in order to increase or decrease the value of a number. - PowerPoint PPT Presentation
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Mr. Rojas’ Third Grade ClassMr. Rojas’ Third Grade ClassSchool : Lee Britain ElementarySchool : Lee Britain Elementary
2006-20072006-2007
Topic : Rounding to Topic : Rounding to HundredsHundreds
Students :Students :
Helen L.Helen L. Vicky C.Vicky C. Andrea T.Andrea T. Gabriela G.Gabriela G.
RoundingRounding
• Rounding is the process of changing Rounding is the process of changing some digits to zeros in order to some digits to zeros in order to increase or decrease the value of a increase or decrease the value of a number.number.
• It seems complicated but I promise it It seems complicated but I promise it is not.is not.
• Example :Example :
• Round 5,784 to the nearest hundreds. Round 5,784 to the nearest hundreds.
• Step 1: Underline the digit that is in the Step 1: Underline the digit that is in the hundreds place, in this case 7.hundreds place, in this case 7.
• 5,5,778484
• Step 2: Find out the value of this Step 2: Find out the value of this digit.digit.
5,5,778484
•As the digit 7 is in the hundreds As the digit 7 is in the hundreds place, its value is 700.place, its value is 700.
• Step 3: Draw a number line and Step 3: Draw a number line and locate the next hundreds. locate the next hundreds.
5,700 5,800
•Step 4: Observe the digit that is in the right side Step 4: Observe the digit that is in the right side of the digit you are rounding. of the digit you are rounding.
5, 7 8 4
• If the digit is :If the digit is :
• 5,6,7,8 or 9 the number goes up to 5,6,7,8 or 9 the number goes up to the next hundreds. In this case to the next hundreds. In this case to 5,8005,800
• If the digit is :If the digit is :
• 4,3,2,or 1 the number remains in the 4,3,2,or 1 the number remains in the same hundred. In this case 5,700.same hundred. In this case 5,700.
•
• In this case as the digit 8 is the digit In this case as the digit 8 is the digit to the right side of the digit you are to the right side of the digit you are rounding.rounding.
5,5,778484• The number goes up to.The number goes up to.
5,8005,800
