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Annotation of researchv10dc/man/mana/arithmetic.6, revision 1.1

1.1     ! root        1: .TH ARITHMETIC 6
        !             2: .CT 1 inst_info
        !             3: .SH NAME
        !             4: arithmetic \- drill in number facts
        !             5: .SH SYNOPSIS
        !             6: .B /usr/games/arithmetic
        !             7: [
        !             8: .B +-x/
        !             9: ]
        !            10: [
        !            11: .I range
        !            12: ]
        !            13: .SH DESCRIPTION
        !            14: .I Arithmetic
        !            15: types out simple arithmetic problems,
        !            16: and waits for an answer to be typed in.
        !            17: If the answer is correct,
        !            18: it types back
        !            19: .LR Right! ,
        !            20: and a new problem.
        !            21: If the answer is wrong,
        !            22: it replies
        !            23: .L What? ,
        !            24: and waits for another answer.
        !            25: Every twenty problems, it publishes
        !            26: statistics on correctness and the time required
        !            27: to answer.
        !            28: .PP
        !            29: To quit the program,
        !            30: type an interrupt (delete).
        !            31: .PP
        !            32: The first optional argument determines the kind of problem
        !            33: to be generated;
        !            34: .B +-x/
        !            35: get
        !            36: addition, subtraction, multiplication, and division
        !            37: problems respectively.
        !            38: One or more characters can be given;
        !            39: if more than one is given, the different types of
        !            40: problems will be mixed in random order; default is
        !            41: .B +-
        !            42: .PP
        !            43: .I Range
        !            44: is a decimal number;
        !            45: all addends, subtrahends, differences, multiplicands, divisors,
        !            46: and quotients will be less than or equal to the value of
        !            47: .IR range .
        !            48: Default
        !            49: .I range
        !            50: is 10.
        !            51: .PP
        !            52: At the start, all numbers less than or equal to
        !            53: .I range
        !            54: are equally likely
        !            55: to appear.
        !            56: If the respondent makes a mistake,
        !            57: the numbers in the problem which was missed
        !            58: become more likely to reappear.
        !            59: .PP
        !            60: As a matter of educational philosophy, the program will
        !            61: not give correct answers,
        !            62: since the learner should, in principle,
        !            63: be able to calculate them.
        !            64: Thus the program is intended to provide drill for
        !            65: someone just past the first learning stage,
        !            66: not to teach number facts
        !            67: .I de
        !            68: .IR novo .
        !            69: For almost all users,
        !            70: the relevant statistic should be
        !            71: time per problem, not percent correct.

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