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CLEP General Mathematics: Percentage And Measurement

Subjects : clep, math, measurement
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
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This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. To change a decimal to percent multiply the decimal by 100 and annex the percent sign (%). Since multiplying by 100 has the effect of moving the decimal point two places to the right - the rule is sometimes stated as follows:






2. The maximum probable error is found when the denominator of the fraction expressing the error ratio is divided into the numerator or






3. It is important to realize that precision refers to






4. Deals with the group of decimal fractions whose denominators are 100-that is fractions of two decimal places.






5. Since hundredths were used so frequently - the decimal point was dropped and the symbol % was placed after the number and read

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6. The word 'percent' is derived from Latin. It was originally 'per centum -' which means 'by the hundred.' Thus the statement is often made that 'percent' means






7. In order to multiply or divide two approximate numbers having an equal number of significant digits






8. It can also be shown that the precision of a difference is no greater than the all numbers should first be rounded off to






9. Relative error is the ratio between the _________________. This ratio is simply the fraction formed by using the probable error as the numerator and the measurement itself as the denominator.






10. The precision of a number resulting from measurement depends upon






11. Common fractions are changed to percent by flrst expressmg them as






12. The accuracy of a measurement is often described in terms of the number of






13. Drop the percent sign and divide the number by 100. Mechanically - the decimal point is simply shifted two places to the left and the percent sign is dropped.






14. Percent is used in discussing






15. To find the percentage of a number - multiply the base by the rate. The rate must be changed from a percent to a decimal before multiplying can be done.






16. The base corresponds to the multiplicand - the rate corresponds to the multiplier - and the percentage corresponds to the product...We then divide the product (percentage) by the multiplicand (base) to get the other factor (rate).






17. In a number such as 49.30 inches - it is reasonable to assume that the 0 in the hundredths place would not have been recorded at all if it were not a






18. The precision of a sum is no greater than






19. Form the basis for the rules which govern calculation with approximate numbers (numbers resulting from measurement).






20. After performing the' multiplication or division






21. The accuracy of a measurement is determined by the ________






22. To flnd the bue when the rate and percentage are known






23. The more precise numbers are all rounded to the precision of the






24. Experience has shown that the best the average person can do with consistency is to decide whether a measurement is more or less than halfway between marks. The correct way to state this fact mathematically is to say that a measurement made with an i






25. It is possible to round off a repeating decimal at any desired point - the degree of precision desired should be determined and:






26. The maximum probable error is






27. FRACTIONAL PERCENTS.-A fractional percent represents a part of 1 percent.






28. To find the rate when the percentage and base are known






29. To to find the percentage of a number when the base and rate are known.






30. Closely associated with the study of decimals is a measuring instrument known as a micrometer.






31. The extra digit protects the answer from






32. How much to round off must be decided in terms of






33. A larger number of decimal places means a smaller






34. To add or subtract numbers of different orders






35. There are three cases that usually arise in dealing with percentage - as follows:






36. When a common fraction is used in recording the results of measurement






37. Relative error is usually expressed as






38. The 'of' has the same meaning as it does in fractional examples - such as 1/4 of 16 = ?






39. The probable error in any measurement is how precisely the instrument is marked - The precision of a measurement depends upon






40. Percentage divided by base






41. May be considered as special types of decimals (for example - 4 may be written as 4.00) and thus may be expressed interms of percentage.






42. Depends upon the relative size of the probable error when compared with the quantity being measured.






43. Can be a significant digit if it is not the first digit in the number because it is a part of the number specifying how many hundredths are in the measurement.






44. Can never be more precise than the least precise number in the calculation.






45. A rule that is often used states that the significant digits in a number






46. Is the part of the base determined by the rate.






47. Is the number of hundredths parts taken. This is the number followed by the percent sign.






48. Is the whole on which the rate operates.






49. Has no bearing on the accuracy of the number. For example - 1.25 dollars represents exactly the same amount of money as 125 cents. These are equally accurate ways of representing the same quantity - despite the fact that the decimal point is placed d






50. When it is necessary to use a percent in computation - to avoid confusion the number is written in its by first expressing it as a fraction with 100 as the denominator - Since percent means hundredths - any decimal may be changed to percent