Please tell me how should I take the word 'set', as a plural or a singular?
According to the Compact English Learner's Dictionary (for its one of many definitions of 'theory':
The theory of a practical subject or skill is the set of rules and principles that form the basis of it.
BelieverHi,'set' is singular.
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Anonymous:You see my son in sixth grade was, according to his math teacher, wrong when he answered 'similar fraction' in the fill in the blanks category of his math book seatwork that goes like this...
____________________Set of fractions having the same denominator. (My son's answer was similar fraction, according to his teacher, it's wrong because he lacked the letter 's' in the word fraction of the words 'similar fraction'.)
____________________Set of fractions whose denominators are different. (Dissimilar fraction is my son's answer, wrong again because he lacked the letter 's'.)
____________________Pair or set of fractions that names the same part. (Equivalent fraction is my son's answer, wrong again because he lacked the magic letter 's'.)
please enlighten me about this, thank you for your help...
You need the plural 's' when you are talking about the contents of a set, because a set contains more than one fraction.
But I think the teacher seems to be marking a bit harshly. Your son clearly understands the math concepts, even iif his English is not perfect in every little detail.
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