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This module is from Fundamentals of Mathematics by Denny Burzynski and Wade Ellis, Jr. This module is a proficiency exam to the chapter Addition and Subtraction of Whole Numbers. Each problem is accompanied with a reference link pointing back to the module that discusses the type of problem demonstrated in the question. The problems in this exam are accompanied by solutions.

Proficiency exam

( [link] ) What is the largest digit?

9

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( [link] ) In the Hindu-Arabic number system, each period has three values as­signed to it. These values are the same for each period. From right to left, what are they?

ones, tens, hundreds

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( [link] ) In the number 42,826, how many hundreds are there?

8

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( [link] ) Is there a largest whole number? If so, what is it?

no

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( [link] ) Graph the following whole numbers on the number line: 2, 3, 5.
A number line from 0 to 8.

A number line from 0 to 8 with a dot on the marks for 2, 3, and 5.

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( [link] ) Write the number 63,425 as you would read it aloud.

Sixty-three thousand, four hundred twenty-five

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( [link] ) Write the number eighteen million, three hundred fifty-nine thousand, seventy-two.

18,359,072

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( [link] ) Round 427 to the nearest hundred.

400

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( [link] ) Round 18,995 to the nearest ten.

19,000

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( [link] ) Round to the most reasonable digit: During a semester, a mathematics instructor uses 487 pieces of chalk.

500

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For problems 11-17, find the sums and differences.

( [link] ) 3106 + 921 size 12{"3106"+"921"} {}

4,027

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( [link] ) 5,189 6,189 4,122 + 8,001 ̲

23,501

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( [link] ) 21 + 16 + 42 + 11 size 12{"21"+"16"+"42"+"11"} {}

90

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( [link] ) 520 216 size 12{"520" - "216"} {}

304

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( [link] ) 80,001 -   9,878 ̲

70,123

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( [link] ) Subtract 425 from 816.

391

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( [link] ) Subtract 712 from the sum of 507 and 387.

182

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( [link] ) Is the sum of 219 and 412 the same as the sum of 412 and 219? If so, what makes it so?

Yes, commutative property of addition

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Source:  OpenStax, Fundamentals of mathematics. OpenStax CNX. Aug 18, 2010 Download for free at http://cnx.org/content/col10615/1.4
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