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# View of /trunk/NationalProblemLibrary/maCalcDB/setAlgebra01RealNumbers/sw1_2_12.pg

Wed Oct 19 17:03:53 2005 UTC (7 years, 7 months ago) by jj
File size: 1245 byte(s)
Added subject tag.


    1 #DESCRIPTION
2 ##  Algebra problem: simplifying fraction
3 ##ENDDESCRIPTION
4
5 ##KEYWORDS('algebra', 'fraction')
6 ## hcao tagged and PAID on 2-20-2004
7
8 ## DBsubject('Algebra')
9 ## DBchapter('Basic Algebra')
10 ## DBsection('Real Numbers')
11 ## Date('6/3/2002')
12 ## Author('')
13 ## Institution('')
14 ## TitleText1('College Algebra')
15 ## EditionText1('3')
16 ## AuthorText1('Stewart, Redlin, Watson')
17 ## Section1('1.2')
18 ## Problem1('12')
19 DOCUMENT();        # This should be the first executable line in the problem.
20
22 "PG.pl",
23 "PGbasicmacros.pl",
24 "PGchoicemacros.pl",
26 "PGauxiliaryFunctions.pl"
27 );
28 TEXT(beginproblem());
29 $showCorrectPartialAnswers = 1; 30 31$n1 = random(2,10,1);
32 $n2 = random(2,10,1); 33$n3 = random(2,10,1);
34 $n4 = random(2,10,1); 35 36 BEGIN_TEXT 37 Use properties of real numbers to write the expression 38 $(n1 a)(n2 b+ n3 c- n4 d)$ 39 in the form of 40 $K\cdot ab + M\cdot ac + N\cdot ad.$ 41 The number $$K=$$\{ans_rule(5)\},$BR
42 The number $$M=$$\{ans_rule(5)\},$BR 43 The number $$N=$$\{ans_rule(5)\}.$BR
44 END_TEXT
45
46 $num1 =$n1*$n2; 47$num2 = $n1*$n3;
48 $num3 =-$n1*$n4; 49 50 ANS(strict_num_cmp($num1));
51 ANS(strict_num_cmp($num2)); 52 ANS(strict_num_cmp($num3));
53
54 ENDDOCUMENT();        # This should be the last executable line in the problem.


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