A. Incorrect! You rounded to the nearest ten instead of the nearest tenth. B. Incorrect! Review how to round decimal numbers and try again.

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1 Pre-Algebra - Problem Drill 06: Decimals and Equations Question No. 1 of Round the number to the nearest tenth: Question #01 (A) 280 (B) (C) (D) (E) You rounded to the nearest ten instead of the nearest tenth. Review how to round decimal numbers and try again. C. Correct! You rounded up to the nearest tenth. You rounded to the nearest hundredth instead of the nearest tenth. Review how to round decimal numbers. To round to the nearest tenth: 1. Find the digit in the tenths place Look at the hundredths digit. It is greater than 5. 8 > 5 3. Round the tenths digit up and drop the digits to the right of it rounded to the nearest tenth is The correct answer is (C).

2 Question No. 2 of Choose the best estimate of the product: Question #02 (A) 386 (B) 488 (C) 1,500 (D) 1,905 (E) 2,292 Round the two numbers to the nearest integer then multiply. Round the two numbers to the nearest integer then multiply. Round the two numbers to the nearest integer then multiply. D. Correct! You accurately rounded the two numbers to the nearest integer then multiplied. Round the two numbers to the nearest integer then multiply. Round the two numbers to the nearest integer then multiply ,905 The correct answer is (D).

3 Question No. 3 of Choose the best estimate of the quotient: 2, Question #03 (A) 60 (B) 93 (C) 100 (D) 2,944 (E) 3,008 Round the two numbers to the nearest integer then divide. B. Correct! You accurately rounded the two numbers to the nearest integer then divided. Round the two numbers to the nearest integer then divide. Round the two numbers to the nearest integer then divide. Round the two numbers to the nearest integer then divide. Round the two numbers to the nearest integer then divide. 2, , The correct answer is (B).

4 Question No. 4 of Find the mean of the data set Question #04 (A) 2.53 (B) 3.97 (C) 4.7 (D) 5.73 (E) There is no mean. Review how to find the mean of a data set. Review how to find the mean of a data set. C. Correct! You added the elements of the data set then divided by 6 to find the mean. Review how to find the mean of a data set. Review how to find the mean of a data set. Add the six elements of the data set then divide by 6 to find the mean. Mean = = = The correct answer is (C).

5 Question No. 5 of Find the median of the data set Question #05 (A) 1.6 (B) 7.9 (C) (D) 15.8 (E) 19.2 Review how to find the median of a data set. Review how to find the median of a data set. Review how to find the median of a data set. D. Correct! You ordered the data set from least to greatest then found the middle value. Review how to find the median of a data set. Order the data set from least to greatest and find the middle number The correct answer is (D).

6 Question No. 6 of Find the mode of the data set Question #06 (A) 2.9 (B) 3.6 (C) 3.75 (D) 4.7 (E) There is no mode. A. Correct! You found the number that occurs most often in the data set. Review how to find the mode of a data set. Review how to find the mode of a data set. Review how to find the mode of a data set. Review how to find the mode of a data set. The mode is the number that occurs most often in a data set The correct answer is (A).

7 Question No. 7 of Solve the equation: h = Question #07 (A) (B) 0.36 (C) 2.81 (D) (E) Add to both sides of the equation. Add to both sides of the equation. Add to both sides of the equation. Add to both sides of the equation. E. Correct! You correctly added to both sides of the equation. Add to both sides of the equation. h = h = h = The correct answer is (E).

8 Question No. 8 of Solve the equation: 6.5r = 94.9 Question #08 (A) 0.07 (B) 14.6 (C) 88.4 (D) (E) Divide both sides of the equation by 6.5. B. Correct! You correctly divided both sides of the equation by 6.5. Divide both sides of the equation by 6.5. Divide both sides of the equation by 6.5. Divide both sides of the equation by 6.5. Divide both sides of the equation by r = r 94.9 = r = 14.6 The correct answer is (B).

9 Question No. 9 of Convert 5,630 grams to kilograms. Question #09 (A) 56,300 (B) 5,630 (C) 563 (D) 56.3 (E) 5.63 Multiply the given measurement by the conversion factor, 1 kilogram/ (1000 grams). Multiply the given measurement by the conversion factor, 1 kilogram/ (1000 grams). Multiply the given measurement by the conversion factor, 1 kilogram/ (1000 grams). Multiply the given measurement by the conversion factor, 1 kilogram/ (1000 grams). E. Correct! You accurately multiplied the given measurement by the conversion factor, 1 kilogram/ (1000 grams). Multiply the given measurement by the conversion factor, 1 kilogram/ (1000 grams). 5,630 g = 5,630 x 1 kilogram/ (1000 grams) = 5.63 kg The correct answer is (E).

10 Question No. 10 of Choose the number with five significant digits. Question #10 (A) (B) 26,000 (C) (D) 57,900 (E) 843 A. Correct! This number contains five significant digits. Review the definition of significant digits. Review the definition of significant digits. Review the definition of significant digits. Review the definition of significant digits. Significant digits are all the nonzero digits and the zeros that are included between them, or zeros that are at the end that denote accuracy is the only number that has five significant digits. The correct answer is (A).

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