Noteables Interactive Study Notebook (26491.0K) - McGraw-Hill ...
Noteables Interactive Study Notebook (26491.0K) - McGraw-Hill ... Noteables Interactive Study Notebook (26491.0K) - McGraw-Hill ...
3–2Check Your Progress EXAMS In Mr. Smith’s math class,29.65% of the students earned a grade of “A” at the end of thesemester. In Mrs. Dempsey’s class, 29.85% of the studentsearned a grade of “A” at the end of the semester. Use > or < tocompare the percent in Mr. Smith’s class with the percent inMrs. Dempsey’s class.BUILD YOUR VOCABULARY (page 56)Decimals that nameequivalent decimals.are calledEXAMPLE Order DecimalsREMEMBER ITTo check thereasonableness of theorder of the numbers,you can use a numberline.HOMEWORKASSIGNMENTPage(s):Exercises:Order 25, 25.1, 24.36, and 25.03 from least to greatest.First, line upthe decimalpoints.25 25.0025.1 25.1024.36 24.3625.03 25.03Next, annexzeros so that allnumbers havethe same fi nalplace value.Finally, compareand order usingplace value.The order from least to greatest is 24.36, , 25.03,and .Check Your Progressleast to greatest.Order 71, 71.04, 70.89, and 71.4 fromCopyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.60 Math Connects, Course 1
3–3 Rounding DecimalsEXAMPLE Round DecimalsMAIN IDEA• Round decimals.KEY CONCEPTRounding Decimals Toround a decimal, firstunderline the digit tobe rounded. Then lookat the digit to the rightof the place beingrounded.• If the digit is 4 or less,the underlined digitremains the same.Round 7.601 to the nearest whole number.Underline the digitto be rounded. Inthis case, the onesplace.7.601Then look at the digitto the right. Since 6 isgreater than 5, add oneto the underlined digit.On the number line, 7.601 is closer to 8.0 than .To the nearest whole number, 7.601 rounds to .• If the digit is 5 orgreater, add 1 to theunderlined digit.Check Your Progresswhole number.Round 4.321 to the nearestCopyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.• After rounding, dropall digits after theunderlined digit.Round 68.94 to the nearest tenth.Underline the digit tobe rounded. In thiscase, the digit is inthe tenths place.68.94Then look at the digitto the right. Since 4 isless than 5, the digit9 stays the same.On the number line, 68.94 is closer to than 69.0.To the nearest tenth, 68.94 rounds to .Check Your ProgressRound 125.38 to the nearest tenth.Math Connects, Course 1 61
- Page 18 and 19: 1-4 Order of OperationsMAIN IDEA•
- Page 20 and 21: 1-4ORGANIZE ITOn the Lesson 1-4 tab
- Page 22 and 23: 1-5REMEMBER ITIn algebra, thesymbol
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- Page 106 and 107: 4-5EXAMPLE Find the LCMREVIEW ITWhy
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3–3 Rounding DecimalsEXAMPLE Round DecimalsMAIN IDEA• Round decimals.KEY CONCEPTRounding Decimals Toround a decimal, firstunderline the digit tobe rounded. Then lookat the digit to the rightof the place beingrounded.• If the digit is 4 or less,the underlined digitremains the same.Round 7.601 to the nearest whole number.Underline the digitto be rounded. Inthis case, the onesplace.7.601Then look at the digitto the right. Since 6 isgreater than 5, add oneto the underlined digit.On the number line, 7.601 is closer to 8.0 than .To the nearest whole number, 7.601 rounds to .• If the digit is 5 orgreater, add 1 to theunderlined digit.Check Your Progresswhole number.Round 4.321 to the nearestCopyright © Glencoe/<strong>McGraw</strong>-<strong>Hill</strong>, a division of The <strong>McGraw</strong>-<strong>Hill</strong> Companies, Inc.• After rounding, dropall digits after theunderlined digit.Round 68.94 to the nearest tenth.Underline the digit tobe rounded. In thiscase, the digit is inthe tenths place.68.94Then look at the digitto the right. Since 4 isless than 5, the digit9 stays the same.On the number line, 68.94 is closer to than 69.0.To the nearest tenth, 68.94 rounds to .Check Your ProgressRound 125.38 to the nearest tenth.Math Connects, Course 1 61
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