Chapter 3 - Decimals. After reading this chapter, you should have a good understanding of the following learning objectives: Explain the place values of whole numbers and decimals; round decimals; convert decimal fractions to decimals, proper fractions to decimals, mixed numbers to decimals, and pure and mixed decimals to decimal fractions; add, subtract, multiply, and divide decimals; complete decimal applications in foreign currency; multiply and divide decimals by shortcut methods. | Chapter 3 Decimals McGraw-Hill/Irwin ©2011 The McGraw-Hill Companies, All Rights Reserved Explain the place values of whole numbers and decimals; round decimals Convert decimal fractions to decimals, proper fractions to decimals, mixed numbers to decimals, and pure and mixed decimals to decimal fractions Decimals #3 Learning Unit Objectives Rounding Decimals; Fraction and Decimal Conversions 3- Add, subtract, multiply, and divide decimals Multiply and divide decimals by shortcut methods Complete decimal applications in foreign currency Decimals #3 Learning Unit Objectives Adding, Subtracting, Multiplying, and Dividing Decimals 3- Table - Bag of M&M’s Decimal Percent Color Fraction (hundredth) (hundredth) Yellow 18 .33 55 Red 10 .18 55 Blue 9 .16 55 Orange 7 .13 55 Brown 6 .11 55 Green 5 .09 55 Total 55 55 = 1 Decimal place-value chart Figure Hundreds Thousands Tens Ones Hundredths . | Chapter 3 Decimals McGraw-Hill/Irwin ©2011 The McGraw-Hill Companies, All Rights Reserved Explain the place values of whole numbers and decimals; round decimals Convert decimal fractions to decimals, proper fractions to decimals, mixed numbers to decimals, and pure and mixed decimals to decimal fractions Decimals #3 Learning Unit Objectives Rounding Decimals; Fraction and Decimal Conversions 3- Add, subtract, multiply, and divide decimals Multiply and divide decimals by shortcut methods Complete decimal applications in foreign currency Decimals #3 Learning Unit Objectives Adding, Subtracting, Multiplying, and Dividing Decimals 3- Table - Bag of M&M’s Decimal Percent Color Fraction (hundredth) (hundredth) Yellow 18 .33 55 Red 10 .18 55 Blue 9 .16 55 Orange 7 .13 55 Brown 6 .11 55 Green 5 .09 55 Total 55 55 = 1 Decimal place-value chart Figure Hundreds Thousands Tens Ones Hundredths Tenths Ten Thousandths Thousandths Hundred Thousandths 1,000 100 10 1 1 10 1 . 100 1 . 1,000 1 . 10,000 1 . 100,000 Decimal Point and Whole Number Groups Decimal Place Values Rounding Decimals .3272727 .337272 Step 1. Identify the place value of the digit you want to round Step 2. Identify the digit to the right. If 5 or more, increase the identified digit by 1. If less than 5 do not change Step 3. Drop all digits to the right of the identified digit .33 Rounding Decimals Round to nearest dollar: $ $166 Round to nearest cent: $1, $1, Round to nearest hundredth: $ $ Round to nearest thousandth: $1, $1, Converting Decimal Fractions to Decimals 2 Steps 1. Count the number of zeros in the denominator. 2. Place the numerator of the decimal fraction to the right of the decimal point the same number of places as you have zeros in the denominator. Do not go over the total number of denominator zeros. Fraction Decimal # of places 3 .3 1 10 3 .
