Perform the following mathematical operations and express the result to the correct number of significant figures.

e. 9.5 + 4.1 + 2.8 + 3.175 / 4

(Assume that this operation is taking the average of four numbers. Thus 4 in the denominator is exact.)

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Perform the following mathematical operations and express the result to the correct number of significant figures.

d. (3.8 x 10^{-12} + 4.0 x 10^{-13}) / (4 x 10^{12} + 6.3 x 10^{13})

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Perform the following mathematical operations and express the result to the correct number of significant figures.

c. 6.071 x 10^{-5} - 8.2 x 10^{-6} - 0.521 x 10^{-4}

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b. (6.404 x 2.91) / (18.7 - 17.1)

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a. 2.526 / 3.1 + 0.470 / 0.623 + 80.705 / 0.4326

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Perform the following mathematical operations, and express each result to the correct number of significant figures.

d. 2.00 x 10^{6} / 3.00 x 10 ^{-7}

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Perform the following mathematical operations, and express each result to the correct number of significant figures.

c. 4.0 x 10 ^{4} x 5.021 x 10^{-3} x 7.34993 x 10^{2}

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Perform the following mathematical operations, and express each result to the correct number of significant figures.

b. 0.14 x 6.022 x 10 ^{23}

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Perform the following mathematical operations, and express each result to the correct number of significant figures.

a. 0.102 x 0.0821 x 273 / 1.01

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Evaluate each of the following and write the answer to the appropriate number of significant figures.

e. 7.255 - 6.8350

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Evaluate each of the following and write the answer to the appropriate number of significant figures.

d. 2.01 x 10^{2} + 3.014 x 10^{3}

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Evaluate each of the following and write the answer to the appropriate number of significant figures.

c. 52.331 + 26.01 - 0.9981

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Evaluate each of the following and write the answer to the appropriate number of significant figures.

b. 1.0028 + 0.221 + 0.10337

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Evaluate each of the following and write the answer to the appropriate number of significant figures.

a. 212.2 + 26.7 + 402.09

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How many significant figures are in each of the following?

g. 4.800 x 10^{–}^{3}

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How many significant figures are in each of the following?

g. 4.80 x 10^{–}^{3}

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How many significant figures are in each of the following?

f. 0.00480

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How many significant figures are in each of the following?

e. 0.0048

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How many significant figures are in each of the following?

d. 100.

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How many significant figures are in each of the following?

c. 1.00 x 10 ^{3}

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How many significant figures are in each of the following?

b. 1.0 x 10 ^{2}

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How many significant figures are in each of the following?

a. 100

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Give four examples illustrating each of the following terms.

f. chemical change

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Give four examples illustrating each of the following terms.

e. physical change

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Give four examples illustrating each of the following terms.

d. element

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