1. Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. Chapter 4 Decimals

2. Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. 4.1 Introduction to Decimals

3. Martin-Gay, Basic Mathematics, 4e 33 Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. Decimal Notation and Writing Decimals in Words DefinitionExample Decimal Numbers: Numbers written in decimal notation. Whole number part Decimal part Decimal point p 248

4. Martin-Gay, Basic Mathematics, 4e 44 Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. Decimal Notation and Writing Decimals in Words ( page 248) Like fractional notation, decimal notation is used to denote a part of a whole. Numbers written in decimal notation are called decimal numbers, or simply decimals. Place names and place values for the decimal parts are also shown.

5. Martin-Gay, Basic Mathematics, 4e 55 Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. Writing and Reading Decimals in Words p 249

6. Martin-Gay, Basic Mathematics, 4e 66 Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. Examples Write the decimals in words. a.3.6 three and six tenths b.124. 52 one hundred twenty-four and fifty- two hundredths p 249

7. Martin-Gay, Basic Mathematics, 4e 77 Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. ProblemsAnswers 1. 2. 3. 4. Practice Problems Writing Decimals in Words Write the decimal 8.7 in words. Eight and seven tenths Write the decimal 97.28 in words Ninety-seven and twenty-eight hundredths Write the decimal 302.1056 Three hundred two and one thousand fifty-six ten- thousandths Write the decimal 72.1085 in words Seventy-two and one thousand eighty-five ten- thousandths p 249

8. Martin-Gay, Basic Mathematics, 4e 88 Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. Decimals to Standard Form Examples Write each decimal in standard form. a.Twelve and six hundredths 12.06 b.Fifty-four and seventy-two thousandths 54.072 p 250

9. Martin-Gay, Basic Mathematics, 4e 99 Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. ProblemsAnswers 6. 7. Practice Problems Writing Decimals in Standard Form Three hundred and ninety-six hundredths. 300.96 Thirty-nine and forty-two thousandths 39.042 p 250

10. Martin-Gay, Basic Mathematics, 4e 10 Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. Writing Decimals as Fractions DecimalIn WordsFraction 0.5 five tenths 0.36 thirty-six hundredths 0.002 two thousandths 0.07 seven hundredths p 250-251

11. Martin-Gay, Basic Mathematics, 4e 11 Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. Decimals as Fractions Examples Write the decimals as a fraction or mixed number. a.0.9 b.21.094 1 decimal place1 zero 3 decimal places3 zeros p 250-251

12. Martin-Gay, Basic Mathematics, 4e 12 Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. ProblemsAnswers 8. 9. 10. 11 12. Practice Problems Write 0.037 as a fraction. Write 14.97 as a mixed number. Write 0.12 as a fraction or mixed number. Write 57.8 as a fraction or mixed number Writing Decimals as Fractions Write 209.986 as a fraction or mixed number p 250-251

13. Martin-Gay, Basic Mathematics, 4e 13 Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. Fractions to Decimal Examples Write each fraction as a decimal. a. = 0.6 b. = 36.005 1 decimal place 1 zero 3 decimal places 3 zeros p 251

14. Martin-Gay, Basic Mathematics, 4e 14 Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. ProblemsAnswers 13. 14. 15. 16. p 251 Practice Problems Writing Fractions as Decimals

15. Martin-Gay, Basic Mathematics, 4e 15 Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. DONE