glenda.party
term% ls -F
term% cat index.txt
ARITHMETIC(6)                    Games Manual                    ARITHMETIC(6)



NAME
       arithmetic - drill in number facts

SYNOPSIS
       /usr/games/arithmetic [ +-x/ ] [ range ]

DESCRIPTION
       Arithmetic  types  out simple arithmetic problems, and waits for an an‐
       swer to be typed in.  If the answer is correct, it types back `Right!',
       and  a  new  problem.   If the answer is wrong, it replies `What?', and
       waits for another answer.  Every twenty problems, it publishes  statis‐
       tics on correctness and the time required to answer.

       To quit the program, type an interrupt (delete).

       The first optional argument determines the kind of problem to be gener‐
       ated; +-x/ respectively cause  addition,  subtraction,  multiplication,
       and  division  problems to be generated.  One or more characters can be
       given; if more than one is given, the different types of problems  will
       be mixed in random order; default is +-

       Range  is a decimal number; all addends, subtrahends, differences, mul‐
       tiplicands, divisors, and quotients will be less than or equal  to  the
       value of range.  Default range is 10.

       At  the  start,  all  numbers  less  than or equal to range are equally
       likely to appear.  If the respondent makes a mistake,  the  numbers  in
       the problem which was missed become more likely to reappear.

       As  a  matter of educational philosophy, the program will not give cor‐
       rect answers, since the learner should, in principle, be able to calcu‐
       late  them.   Thus the program is intended to provide drill for someone
       just past the first learning stage, not to teach number facts de  novo.
       For  almost  all users, the relevant statistic should be time per prob‐
       lem, not percent correct.



                                                                 ARITHMETIC(6)