. Practical mathematics : an elementary treatise covering the fundamental processes of arithmetic, algebra, and geometry, with a practical presentation of logarithms and curve plotting. hird or million period; and so on.* * Commas are used to separate the different periods of figures. In reading numbersnever use and to connect the periods. hundreds tens units 5 = 5 units 0 0 = : 0 tens 4 0 0 = : 4 hundreds 4 0 5 = total 6 PRACTICAL MATHEMATICS The system of periods is shown clearly in Table III. Such a numberas 534 consists of one period and is read—five hundred number shown be
. Practical mathematics : an elementary treatise covering the fundamental processes of arithmetic, algebra, and geometry, with a practical presentation of logarithms and curve plotting. hird or million period; and so on.* * Commas are used to separate the different periods of figures. In reading numbersnever use and to connect the periods. hundreds tens units 5 = 5 units 0 0 = : 0 tens 4 0 0 = : 4 hundreds 4 0 5 = total 6 PRACTICAL MATHEMATICS The system of periods is shown clearly in Table III. Such a numberas 534 consists of one period and is read—five hundred number shown below the orders in Table II is read—two million,seven hundred fifteen thousand, six hundred thirty-nine. TABLE IIThe Orders 7th 6th co a a CO O H CM 5th CO Cc3 CO o 4th 3rd 2nd 1st coS3 o CO (V 0 o •3 a3 •3- CD O -a coS3 0) 3 O J3 3 CO a CD •3 § W h H w Eh P 2 7 1 5 6 3 9 The number in Table III, which is 987654321987654, is dividedinto the periods 987, 654, 321, 987, 654, and is read—nine hundredeighty-seven trillion, six hundred fifty-four billion, three hundredtwenty-one million, nine hundred eighty-seven thousand, six hun-dred fifty-four. TABLE III The Periods *J. 53 °a T3 T3 £ £ Jga Jga pga sga sga Whp Whp Khp Whp KhP 987 654 321 987 654 5th 4th 3rd 2nd 1st Period Period Period Period Period PRACTICAL MATHEMATICSPROBLEMS FOR PRACTICE Write in words: 1. 18,765,972. 2. 834,769,780. 3. 3,576,879,42 1. 4. 10,805,056. Ans. Write in figures: ? Ten million, eight hundred five thou-sand, fifty-six. 5. Seventy-eight million, forty-one thousand seven. 6. One thousand three. Ans. 1,003. 7. Five hundred six thousand. S. Ninety million, two thousand, three hundred twenty-seven. 9. Three hundred five thousand seventy-nine. 10. Eight hundred sixty-four million, four thousand, twenty. ADDITION 7. Adding is the process of finding a number which is equal tothe combined values of two or more given numbers. The result thusobtained is called the sum. Hence, it may be said that t
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