Multiplication and Division of Decimals Changing Decimals to Common Fractions 210-216 MODERN ARITHMETIC BOOK TWO-PART ONE FIFTH GRADE FIRST HALF READING AND WRITING NUMBERS IN the First Book, we used but few numbers that required more than six figures. Because larger numbers are sometimes used, we shall learn how to read and write them. This number is read, four hundred sixty-five billion, two hundred nine million, three hundred fifteen thousand, eighty seven. A comma (,), sometimes called a separatrix, is used between periods to aid in reading numbers. Oral 1. Name the periods in this number. 2. How many places are there in each period? 3. How many periods are there? How many places in all? 1 Read these numbers: In reading numbers avoid saying "and." For example, say "five hundred eighty-seven"—not "five hundred and eighty-seven." Write these numbers in figures: 1. Fifty-one thousand, two hundred sixteen. 2. Seven hundred twenty-one thousand, two hundred. 3. Four million, six hundred eight thousand, three hundred seventy-five. 4. Twenty-five thousand, seven. 5. Twenty-seven million, six hundred fifty. 6. Eighty million, six hundred nine thousand, four hundred twenty-eight. 7. Six hundred twenty million, seventeen thousand. 8. One hundred fifty-seven million, six hundred eight thousand, four hundred seventy-seven. 9. Three billion, fifty-seven million, four hundred seventeen thousand, sixty. 10. Write a number containing three periods. Practice writing numbers from dictation until it can be done rapidly without error. |