![]() Finally, divide the sum by the numerator. To convert to a fraction, multiply the whole number by the denominator in the fraction. Mixed numbers: A mixed number combines a whole number with a fraction. Here it is read "five divided by eight," which works out to 0.625. For example:įive (5) is the numerator eight (8) is the denominator. The number on top is called the numerator the number on the bottom is called the denominator. However, (2!)/(3!) is.įractions are one number divided by another. For example, (2/3)! is not a valid mathematical operation. There is no such thing as (-5)!, for example. Negative numbers are not used in factorials.0! = 1 - 0! (zero factorial) does not equal zero.But there is no such thing as negative time! So eliminate -4, and your answer is +4.Ī factorial is represented with an exclamation point - "!" It means multiply all integers from one to that number. For example, if you were told that the height of an object goes as:Īnd given a height of 16, asked to find the time, you would get answers of time = +4 or -4. The answer turns out to be +4 or -4! Remember that even though you may find multiple answers a problem often will make sense only with one answer. ![]() This is a bit strange: How do you multiply something by itself only half a time? In the example above, we are looking for the square root, or the number that when squared would make 16. ![]() To calculate, you just multiply the base by itself exponent times. (3)^4 says "three raised to the fourth power" or "three to the fourth." The lower number is called the "base," and the power to raise it to is called the "exponent." Here, 3 is the base, and 4 is the exponent. Calculated as pi x (radius)^2.Įxponents represent the number of times to multiply something by. Calculated as 2 x pi x radius.Īrea: The two-dimensional area enclosed by a circle. The distance straight from one point on the perimeter, passing through the center, meeting the perimeter on the other side.Ĭircumference: The perimeter of a circle. Radius: The distance from the center of a circle to any point on its perimeter.ĭiameter: Twice the radius.
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