View of /trunk/NationalProblemLibrary/CollegeOfIdaho/setAlgebra_01_02_OperationsWithRealNumbers/12IntAlg_09_OperationsWithReals.pg

    1 ##DESCRIPTION
    2 ##  Add signed numbers
    3 ##
    4 ##ENDDESCRIPTION
    5 ## DBsubject('Intermediate Algebra')
    6 ## DBchapter('Ch 01: Algebra, Mathematical Models and Problem Solving')
    7 ## DBsection('Operations with Real Numbers and Simplifying Algebraic Expressions')
    8 ## KEYWORDS('real numbers','operations with signed numbers')
    9 ## TitleText1('Essentials of Intermediate Algebra')
   10 ## EditionText1('1')
   11 ## AuthorText1('Blitzer')
   12 ## Section1('1.2')
   13 ## Problem1('')
   14 ## Author('RA Cruz')
   15 ## Institution('The College of Idaho')
   16 ## Date: 2007/09
   17 
   18 
   19 DOCUMENT();        # This should be the first executable line in the problem.
   20 
   21 loadMacros(
   22   "PGstandard.pl",
   23   "MathObjects.pl",
   24   "contextLimitedNumeric.pl"
   25 );
   26 
   27 TEXT(beginproblem());
   28 
   29 ######################################
   30 #  Setup
   31 
   32 $a1 = random(2,12,1);
   33 $a2 = $a1 + random(2,7,1);
   34 
   35 $b1 = random(2,12,1);
   36 $b2 = random(-12,-2,1);
   37 ######################################
   38 #  Main text
   39 
   40 BEGIN_TEXT
   41 Subtract as indicated:
   42 $PAR
   43 a) \( $a1 - $a2 = \)  \{ ans_rule(10) \}
   44 $PAR
   45 b) \( $b1 - ($b2) = \)  \{ ans_rule(10) \}
   46 $BR
   47 
   48 END_TEXT
   49 
   50 ######################################
   51 #  Answers
   52 
   53 Context("LimitedNumeric");
   54 
   55 $ans_a=Real($a1 - $a2)->reduce;
   56 ANS($ans_a->cmp);
   57 
   58 $ans_b=Real($b1 - $b2)->reduce;
   59 ANS($ans_b->cmp);
   60 
   61 $showPartialCorrectAnswers = 1;
   62 
   63 ######################################
   64 
   65 
   66 COMMENT('MathObject version');
   67 ENDDOCUMENT();