zMATH 170  - Unit 6: Equivalent Decimals, Decimal Computations – Add, Subtract and Multiply

Equivalent Decimals


1)

True or False. 17.34 = 17.340


2)

True or False. 5.700 = 5.70


3)

Arrange these decimals in order from least to greatest. (Hint: Add enough zeros so that each decimal has the same number of decimal places, then compare.

 6.52           6.5             6.503


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Add and Subtract Decimals

Find the sum or difference for problems #4 through #8. Estimate to check answers.


4)

7.9803 + 4.56 + 281.952


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5)

345.8 + 23 + 4.356


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6)

7.684 – 3.791


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7)

56 – 3.4789


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8)

8.2 – 4.396


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Multiply Decimals

Find the product. Estimate to check answers.


9)

0.7 × 0.8


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10)

0.22 × 0.4


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11)

0.05 × 0.06 (Simplify the answer with an equivalent decimal. Ex. 0.0500 = 0.05)


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Find the product for problems #12 through #13. Estimate to check answers.


12)

6.83 × 9.4


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13)

15 × 7.2


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Find the product for problems #14 through #15. Estimate to check answers.


14)

8.31 × 9.45


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15)

789.4 × 0.845


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Review


16)

Estimate.  3.04 × 5.3


17)

Find the sum.


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18)

Is 5/11 rational or irrational? State the first five decimal places for the number and explain your decision.


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19)

Solve.


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20)

Find the sum.


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21)

Find the sum.


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22)

Find the difference.


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23)

Find the product.


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24)

Find the quotient.


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25)

Evaluate.  60


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