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Arithmetic - An Introduction to Mathematics by L. Clark Lay

By L. Clark Lay

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465, 3, 5 7. 510, 2, 3, 5 8. 570, 2, 3, 5 9. 3, 2. 258, 2, 3 5 10. 666, 2, 3, 3 3. 11. 816, 2, 3, 3 266, 2, 7 714, 2, 3, 7 12. 966, 2, 3, 7 1,020, 2, 2, 3, 5 14. 1,092, 2, 2, 3, 7 15. 1,300, 2, 2, 16. 1,116, 2, 2, 3, 3 17. 1,368, 2, 2, 3, 3 18. 1,836, 2, 2, 3, 3 13. 5, 5 Combined Operations 3-7. Most of the computation in elementary arithmetic subtraction, multiplication, and is limited to addition, division; hence, these are called the fundamental arithmetic operations. Suppose a problem involving some or sidered and a statement is desired which order of doing these operations.

A school libarary contained 2,571 volumes at the beginning of a school During the year 245 volumes were added to the library but 67 year. volumes were lost or discarded. How many volumes were in the library at the close of the year? How much sum and 16 exceed their difference? How much change should he 20. Frank made purchases of 21 and 52 cents. receive from a dollar bill? 21. A filling station operator put 2,257 gallons in an empty tank, and then sold from it 243 gallons during the day. How many gallons are still needed to fill the tank which has a capacity of 4,000 gallons?

3-5. Properties of Division It has been noted that if only the natural numbers are being used, the division A by B is possible only under quite limited circumstances. sense only if A of is ^ of the sign to For zero or a multiple of H. of division will not be discussed until mean "not always this reason, A s makes D some of the properties Some use will be made we are using fractions. " 1. A = -j 1, if A This follows from 9^ 0. same number 2. y= A. A B 3. -Tj 7* -j A 4. -7r If a unless A B ^ ^ number B = is A.

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