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

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

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

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.

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

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 one hundred twenty-four and fifty- two hundredths p 249

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

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 b.Fifty-four and seventy-two thousandths p 250

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

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 two thousandths 0.07 seven hundredths p

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 decimal place1 zero 3 decimal places3 zeros p

Martin-Gay, Basic Mathematics, 4e 12 Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. ProblemsAnswers Practice Problems Write as a fraction. Write 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 as a fraction or mixed number p

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. = decimal place 1 zero 3 decimal places 3 zeros p 251

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

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