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  1. #1
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    Default Use of Plural for Decimal numbers

     
    Use of Plural with Decimal Numbers

    Date: 02/27/2002 at 0912
    From: Eric Derobert
    Subject: Use of plural with decimal numbers

    Hello !

    For natural numbers, the use of plural is of course easy :

    0 point, 1 point, 2 points, 3 points...

    But what happens when using decimal numbers between 1 and 2 ?
    What are the rules for 1.0001, 1.1, 1.5 or 1.999 ?

    Should we write
    1.0001, 1.1, 1.5, 1.999 point
    or
    1.0001, 1.1, 1.5, 1.999 points ?

    Thank you !

    Date: 02/27/2002 at 1259
    From: Doctor Peterson
    Subject: Re: Use of plural with decimal numbers

    Hi, Eric.

    I believe you are asking whether, in English, we treat various numbers
    as singular or plural. My understanding is that we consider ONLY the
    number 1 as singular; in particular, zero is a plural: we say "0
    degrees" or "0 (no) apples," not "0 degree" or "0 apple." We do not
    use fractions as adjectives at all, but say "half (of) an apple" or
    "two thirds of a degree" with the fraction standing alone as a noun
    phrase, so it would not be quite accurate to say that a proper
    fraction is singular. With a mixed number, we tend to use a plural:
    "one and a half apples."

    Applying these ideas to decimals, I would say

    0.5 apple (half an apple, five tenths of an apple)
    0.9 apple
    1.1 apples
    1.5 apples

    In other words, anything greater than one can be taken as plural, as
    well as zero and possibly negative numbers. But in many cases the
    plural might be used with decimals smaller than 1; I have no strong
    objection to "0.5 meters".

    I have not found a reference to support any of my advice, which is
    based mostly on what feels right to me.

    - Doctor Peterson, The Math Forum
    http://mathforum.org/dr.math/

    Date: 02/27/2002 at 13:09:41
    From: Eric Derobert
    Subject: Use of plural with decimal numbers

    Dear Dr Peterson,

    In fact, I did some research from my 1st asking, and the rule appears
    to be different in English and in French (I am from France).

    In French the rule is to use plural for a noun when the number before
    is greater or equal to 2 (see this official reference from Quebec-
    Canada : http://www.olf.gouv.qc.ca/index.html?/sommaire.html ).

    From the

    Guide to Grammar and Writing
    http://webster.commnet.edu/grammar/numbers.htm

    I found a different rule : when the absolute value of a fractional or
    decimal expression is 1 or less, the word it modifies should be
    singular (that's exactly what you apply in your 4 apples examples).

    "When fractional or decimal expression are 1 or less, the word
    they modify should be singular: 0.7 meter, 0.22 cubic foot,
    0.78 kilometer. Precede decimal fractions with a value less than
    one with a leading zero before the decimal point."

    But also, when you say that singular applies only to 1, the examples
    you propose seem very familiar : I've heard "0 degrees", and I've read
    "0.5 meters"...

    Apparently, the rules then depend on languages and uses... But
    perhaps, some official rule exists for English as a whole ?

    How interesting !

    Kind regards.
    Eric

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  2. #2
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    Date: 02/27/2002 at 1413
    From: Doctor Peterson
    Subject: Re: Use of plural with decimal numbers

    Hi, Eric.

    English (and especially American English) has no "official" rules for
    anything, though there are many "experts" who claim to give such
    rules. But with or without regulation, this is definitely a linguistic
    issue rather than one of mathematics or logic. Each language has a
    different set of rules for number as well as other aspects of grammar
    - for example, some languages have not only a singular and a plural,
    but a "dual" for exactly two, which would raise additional questions
    when applied to, say, 2.001. Different rules may be equally logical,
    and different languages may have different needs.

    Here is another reference I found (from Germany, but referring to
    English:

    Vocabulary Box: SI Units of Measure(ment)
    http://mueller.zems.tu-berlin.de/evt...voc/bx_SI.html

    With a few exceptions, plurals of spelled-out units are formed
    conventionally. Use the singular form with numbers less than or
    equal to 1, and use the plural form with numbers greater than 1.
    (In spoken English, however, decimal numbers take the plural
    form even if they are less than 1, e.g. "a quarter second" but
    "zero point two five seconds.")

    This shows that both of the rules I gave have their place.

    - Doctor Peterson, The Math Forum
    http://mathforum.org/dr.math/

    Date: 02/27/2002 at 1613
    From: Doctor Peterson
    Subject: Re: Use of plural with decimal numbers

    Hello, Eric!

    I looked again and found that although your Quebec URL referred only
    to the main page (because the source uses a frame), another link takes
    me to a FAQ with the answer you described:

    http://www.olf.gouv.qc.ca/ressources/faq/760.html

    Here is a translation:

    Agreement of the noun after a fractional number less than two

    The noun that follows a fractional number less than two, such as
    one and a half, does not take the plural. Contrary to the English
    use, the name million, when one writes 1,5 million, remains in the
    singular. Moreover, the oral pronunciation shows that it is about
    a unit: one million five hundred thousand.

    The rule of agreement is the following: a name preceded by a
    number takes the plural only when this number is equal to or
    greater than two.

    Here are some examples:

    1,3 billion people (it is necessary to say: a billion three
    hundred million people);

    1,47 meter (it is necessary to say: one meter 47);

    An average of 1,25 child by household (it is necessary to say:
    a child and a quarter).

    Note that "the English use" for "million" differs from the American
    usage; the English say "1.5 millions," but we Americans use the
    singular no matter how many million it is.

    I suspect that the reason for the French rule lies in the way you say
    the number. You say the whole part, then the unit (million, meter,
    child), then the fractional part (three hundred million, 47, quarter).
    So if the whole part is one, you use the singular, and if it is two or
    more you use the plural. We think of the entire number as more than
    one and therefore plural; you use only the whole part as a direct
    modifier, which is NOT more than one in these cases, though a fraction
    is then added to it. The difference is entirely in the grammar, which
    determines the choice of words.

    Another page gives some related ideas on fractions:

    La foire aux questions linguistiques
    http://www.olf.gouv.qc.ca/ressources/faq/815.html

    In English we tend always to think of the fraction as a number in
    itself, rather than as a phrase, and to emphasize agreement in meaning
    rather than form; we would never say "2/3 of the road are open," even
    though grammatically the subject of the verb is the plural "thirds."
    But we would say "2/3 of the students are present," because there must
    be more than one student. On the other hand, the British would say
    "2/3 of the class are present," while an American might prefer
    "2/3 of the class is present," because we tend to treat collective
    nouns as singular. Language has its reasons, but they are not always
    in agreement.

    Of course, this is entirely a grammatical matter in French, and mostly
    a logical issue in English (that is, we aren't thinking of grammar,
    but only of whether more than one is under consideration). So in
    French this usage with fractions disagrees with the "two or more are
    plural" rule, because the grammar differs in the two cases, whereas in
    English we more consistently focus on the meaning.

    I've enjoyed looking into this issue, even though it is really a
    question for Dr. Linguistics.

    - Doctor Peterson, The Math Forum
    http://mathforum.org/dr.math/

    Date: 02/28/2002 at 0505
    From: Eric Derobert
    Subject: Use of plural with decimal numbers

    Dear Dr Peterson,

    Thank you for spending such an amount of time to answer this
    paramathematical topic ! This is very complete.

    I think you are right when emphasizing the role of the way of saying
    numbers : "1.50 meters" in English and "1 metre 50" in French, which
    is written "1,50 metre" for consistency.

    Kind regards, and thank you again !

    Eric

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