The factors of 80 are 1, 2, 4, 5, 8, 10, 16, 20, 40 and 80. Factors are the numbers that are multiplied together to get another number. For example, to get the number 80, multiply 2 by 40, 4 by 20, 8 by 10, 5 by 16 or 1 by 80.Continue Reading
Factorization is used in a variety of mathematical operations, including basic arithmetic, algebra, fractions, and to determine the greatest common factor shared by two numbers. Another type of factorization, prime factorization, is the process of determining which prime numbers to multiply together to get the desired number. Prime numbers are whole numbers greater than one that are evenly divisible only by 1 or itself. Examples of prime numbers include 2, 3, 5, 7, 11, 13, 17 and 23 because they are not evenly divisible by any other number except 1.
A common method of determining factors is the use of a factor tree. Starting with the original number at the top of the page, which in this case is 80, draw two downward-sloping branches. Next, determine two of the known factors of 80, and list one on each branch. For example, if the numbers placed on the first two branches were 2 and 40, a person would then continue to factor by drawing two branches from 40 and providing two factors, such as 5 and 8. Continue to add branches until there are no additional factors remaining. The reason that branches were only drawn on the 40 and not on the 2 is because 2 is a prime factor and cannot be factored any further.Learn more about Arithmetic
In a multiplication table, the numbers in the first row and the first column are all factors, and the numbers in the interior rows and columns are all products. To use the table to find the answer to a multiplication problem, locate one factor in the first row and the other factor in the first column. The number in the interior square where the column and row meet is the product of the problem.Full Answer >
A factor rainbow is a way of writing factors for numbers using a series of arcs. It helps students ensure they have all the factors by listing them in consecutive order.Full Answer >
The formula for the arithmetic mean of a group of numbers is A = S/N, where S represents the sum of all the numbers in the group, and N represents the total number of items in the group. Finding the arithmetic mean is essentially the same as taking the average.Full Answer >
The median is the number that is in the middle in a list of sorted numbers. To find the median, the numbers must be sorted from lowest to highest.Full Answer >