Sunday, May 8, 2011
Maths Words Problems
Today i write an article about maths words problems....
Mathematicians decided long ago to conserve on words and
explanations and replace them with symbols and single letters.
The only problem is that a completely different language
was created, and you need to know how to translate from
the cryptic language of symbols into the language
of words. The operations have designations such as +, –, ×, and ÷.
Algebraic equations use letters and arrangements of those letters and numbers
to express relationships between different symbols.
Words used in maths are very precise. The words have the same meaning
no matter who’s doing the reading of a problem or when it’s being
done. These precise designations may seem restrictive, but being strict is
necessary — you want to be able to count on a mathematical equation or
expression meaning the same thing each time you use it.
For example, in maths, the word rational refers to a type of number or
function. A person is rational if he acts in a controlled, logical way. A number
is rational if it acts in a controlled, structured way. If you use the word rational
to describe a number, and if the person you’re talking to also knows
what a rational number is, then you don’t have to go into a long, drawn-out
explanation about what you mean. You’re both talking in the same language,
so to speak.
Defining types of words that used for numbers
(maths words problems) Naming numbers
Numbers have names that you speak. For example, when you write down a
phone number that someone is reciting, you hear two, one, six, nine, three,
two, seven, and you write down 216-9327. Some other names associated with
numbers refer to how the numbers are classified.
Natural (counting): The numbers starting with 1 and going up by ones
forever: 1, 2, 3, 4, 5, . . .
Whole: The numbers starting with 0 and going up by ones forever.
Whole numbers are different from the natural numbers by just the
number 0: 0, 1, 2, 3, 4, . . .
Integer: The positive and negative whole numbers and 0: . . . ,–3, –2, –1,
0, 1, 2, 3, 4, . . .
Rational: Numbers that can be written as p/q where both p and q are
integers, but q is never 0:3/4,19/8,-5/21,24/6 and so on
Even: Numbers evenly divisible by 2: . . . ,–4, –2, 0, 2, 4, 6, . . .
Odd: Numbers not evenly divisible by 2: . . . ,–3, –1, 1, 3, 5, 7, . . .
Prime Numbers divisible evenly only by 1 and themselves: 2, 3, 5, 7, 11,
13, 17, 19, 23, 29, . . .
Composite: Numbers that are not prime; numbers that are evenly divisible
by some number other than just 1 and themselves: 4, 6, 8, 9, 10, 12,
14, 15, . . .