Noteables Interactive Study Notebook (26491.0K) - McGraw-Hill ...
Noteables Interactive Study Notebook (26491.0K) - McGraw-Hill ... Noteables Interactive Study Notebook (26491.0K) - McGraw-Hill ...
3–3EXAMPLE®ORGANIZE ITUnder Lesson 3-3 of yourFoldable, explain how toround $125.657 to thenearest cent.Chapter 3:OperationswithDecimalsBEANS A can of black beans costs $0.0726 per ounce.To the nearest cent, how much does an ounce of blackbeans cost?There arecents in a dollar. So, rounding to the nearestcent means to round to the nearest .Underline the digitin the hundredthsplace.0.0726Then look at the digit tothe right. Since 2 is lessthan 5, the digit 7 staysthe same.To the nearest cent, an ounce of beans costs .Check Your Progress CEREAL The price per ounce fora box of cereal is shown as $0.1275 on the tag in the grocerystore. How much is this to the nearest cent?HOMEWORKASSIGNMENTPage(s):Exercises:Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.62 Math Connects, Course 1
3–4 Estimating Sums and DifferencesEXAMPLES Use Estimation to Solve ProblemsMAIN IDEA• Estimate sums anddifferences of decimals.POPULATION The table below shows the population ofthe American colonies in 1770.ColonyPopulation(thousands)ColonyPopulation(thousands)Connecticut 183.9 New York 162.9Delaware 35.5 North Carolina 197.2Georgia 23.4 Pennsylvania 240.1Maryland 202.6 Rhode Island 58.2Massachusetts 235.3 South Carolina 124.2New Hampshire 62.4 Virginia 447.0New Jersey 117.4Source: The World AlmanacCopyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.Estimate the total population of North Carolina andSouth Carolina.Round each number to the nearest hundred for easier adding.197.2 197.2 rounds to .____ + 124.2 + 124.2 rounds to ._____There were aboutand South Carolina.thousand people in North CarolinaEstimate how many more people lived in Rhode Islandthan in Georgia in 1770.Round each number to the nearest ten for easier subtracting.58.2 58.2 rounds to .____ + 23.4 - 23.4 rounds to ._____40There were about 40 thousand more people.Math Connects, Course 1 63
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3–4 Estimating Sums and DifferencesEXAMPLES Use Estimation to Solve ProblemsMAIN IDEA• Estimate sums anddifferences of decimals.POPULATION The table below shows the population ofthe American colonies in 1770.ColonyPopulation(thousands)ColonyPopulation(thousands)Connecticut 183.9 New York 162.9Delaware 35.5 North Carolina 197.2Georgia 23.4 Pennsylvania 240.1Maryland 202.6 Rhode Island 58.2Massachusetts 235.3 South Carolina 124.2New Hampshire 62.4 Virginia 447.0New Jersey 117.4Source: The World AlmanacCopyright © Glencoe/<strong>McGraw</strong>-<strong>Hill</strong>, a division of The <strong>McGraw</strong>-<strong>Hill</strong> Companies, Inc.Estimate the total population of North Carolina andSouth Carolina.Round each number to the nearest hundred for easier adding.197.2 197.2 rounds to .____ + 124.2 + 124.2 rounds to ._____There were aboutand South Carolina.thousand people in North CarolinaEstimate how many more people lived in Rhode Islandthan in Georgia in 1770.Round each number to the nearest ten for easier subtracting.58.2 58.2 rounds to .____ + 23.4 - 23.4 rounds to ._____40There were about 40 thousand more people.Math Connects, Course 1 63
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