Decimals Part I Decimal is a real number expressed in base 10. It is composed of digits and one decimal point. Each digit in relation to the decimal point has a particular value. Since decimal is a base 10 number, each place has a value that is either ten times larger than the one on its right, or ten times smaller than the one on its left. Writing Word Names for Decimals Steps: 1. Read the whole number 2. Read the decimal point as and 3. Read the decimal fraction (where it is placed on the base 10 line) Example 1: The number 7.9 is read as seven and nine tenths Example 2: The number.02 is read as two hundredths Example 3: The number 15.08 is read as fifteen and eight hundredths Example 4: The number 0.8 is read as eight tenths Example 5: The number 49.056 is read as forty-nine and fifty-six thousandths
Converting Word Names to Decimal Numbers Convert the following word names to decimal numbers: 1) Four and two thousandths 2) Seventy-three and nine hundredths 3) Five Hundred thirty-five and five hundred thirty-five thousandths 4) Ninety-one thousand four and forty-nine thousandths 5) Six Hundred six thousand sixty-six and six hundred sixty-six thousandths 6) Eight Million eighty-eight thousand eight hundred eight and eighty-eight hundredths 7) Nine Hundred ninety-four million one hundred ninety-four thousand nine hundred one and forty-nine thousandths 8) Eight Hundred eight million eighty thousand eight hundred eight and eighty-eight thousandths 9) Three Hundred thirty-nine million three hundred nine thousand nine hundred three and ninety-three thousandths 10) Seven Hundred seventy million seven hundred seven thousand seven hundred seven and seven hundred seven thousandths
Converting Decimal Numbers to Word Names Convert the following decimal numbers to word names: 1) 8.87 2) 32.092 3) 101.101 4) 4973.497 5) 50007.057 6) 605605.605 7) 810810810.801 8) 919191999.909 9) 879978789.897 10) 30073007.307 11) 111222333.444 12) 900000001.019
Addition You may be asked to solve addition problems in a variety of ways. Look at the following problems: 1).8743 +.9451 =? 2) 209.724 + 41.637 =? 3) What is the sum of nine hundred million nine thousand fourteen and fourteen thousand nine hundred fourteen? 4) Lugz shoes says that they sold twenty-two million five hundred seven thousand three pairs of shoes last year. This year they sold thirty-nine million forty-one thousand and seventeen pairs of shoes. How many shoes did they sell for the two years combined? 5) Nike sales grossed over $874,078,157 dollars last year. This year they will gross $125,921,842. How much has Nike made in the last two years? 6) Tangie bought a Prada purse for $347.23. Linda bought a Gucci purse for $397.99. Paula bought a Louis Vuitton for $585.84. Pamela bought a Coach purse for $495.96. If Linda uses her $52 off coupon and Paula uses her $99.99 off coupon, how much did all of the women pay in total? 7) What is the sum of the following numbers combined? Ninety-eight thousand eight and ninety-eight hundredths Eighty-nine thousand nine and eighty-nine thousandths Ninety thousand eight hundred nine and eight thousandths Eight hundred nine thousand eight and ninety-eight hundredths 8) 8999.899 + 9997.89 + 7589.907 + 9668.68 =? 9) What is the sum of 777.991 and 565656.09? 10) 70009002.799 + 9988.875 =?
Subtraction You may be asked to solve subtraction problems in a variety of ways. Look at the following problems: 1) 2486.871-47.909 =? 2) 57307.9-1117.81 =? 3) Find the result of forty-nine thousand two less two thousand twenty-two 4) Subtract ninety-seven thousand ninety-seven from eight hundred thousand eight hundred ninety-seven 5) 29,076,002.97-21,999,044.896 =? 6) 3.789-14 =? 7) Jim had $59.74 in his pocket when he went to Cedar Pointe. On a ride he lost $51.98. How much did he have left in his pocket? 8) ABC Company made $524,005,024 last year. This year they only made $336,912,381. How much did they lose this year? 9) A Scientist calculates that the size of an object is 6.0957 inches less than its actual size of 14.2384 inches. What is the size of the object? 10) TLC Company made $54,209,831.23 last year. This year they lost $72,912,245.76. How much money did they make? 11) Marsha went to New York with $2,309.37. She ended up buying a Coach purse for $235.56, a Gucci purse for $315.72, and a Louis Vuitton for $428.44. How much money did she bring back home? 12) Landers made $97,498,823 this year. But, its Buckingham store lost $32,456,901, the Lords Inn store lost 42,903,993, and its Brentwood store lost $22,137,930. How much did Landers Inc. make or lose for the year?