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Numbers Without numbers, mathematics cannot exist. There are a variety of numbers which you are required to know about. Real Numbers These are rational and irrational numbers. Rational Numbers These will always have terminating or recurring decimals. This means they can always be turned into a fraction. Irrational Numbers These can not be turned into a fraction. They are non-terminating. Integers These are whole positive or negative numbers (-3, -2, -1, 0, 1, 2, 3). Prime Numbers These are numbers with only TWO factors, itself and 1. Square Numbers These numbers are formed by a number multiplied by itself (1, 4, 9, 16...). Fractions Fractions show a number in relation to how many parts there are. They are mostly used to show a number smaller than 1. However, whole numbers can be expressed as fractions as well. You can easily use fractions on most new calculators. However, you should still understand how they work. A Fraction is expressed as: numerator / denominator Addition You have to have a common denominator (this is most easily done by multiplying the two denominators together but remember to do the same to the numerator). 1/3 + 2/5 = 5/15 + 6/15 = 11/15 Subtraction Same method as with addition. 1/2 - 1/3 = 3/6 - 2/6 = 1/6 Multiplication Here you just multiply the numerators together and the denominators together.
Approximate Word count = 877
Approximate Pages = 3.5
(250 words per page double spaced)
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