In math, the mean is the average of a set of numbers. To determine the mean, add all numbers in a set and take this answer and divide it by how many numbers are in the set.
Know MoreStudents often learn about mean, median and mode together. All of these are a form of averages and they are common in pre-statistics courses. The median describes the middle value in a set of numbers. To determine the median, write all numbers in numerical order and find the number in the center. Mode is the most frequent number in a set. If there is a repeat of a number, that is the mode, if there is no repeat, there is no mode.
Learn MoreA 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 >To round a decimal, identify the place value you want to round, which is referred to as the rounding digit. Identify the number immediately to the right of the rounding digit. If the number immediately to the right of the rounding digit is less than five, don't change the rounding digit, and drop all digits to the right. If the number to the right of the rounding digit is greater than five, add one to the rounding digit, and remove all digits to the right.
Full Answer >When 0 is used as a placeholder, it allows people to write numbers in shorthand and tell them apart. For example, the number 509 is shorthand for "5 times 100, plus 0 times 10 plus 9 times 1." Since zero adds no value to the 10's place, it can be used as a placeholder there, creating the possibility of the shorter notation.
Full Answer >The equivalent of 77 centimeters is slightly over 30.3 inches, or a little more than 2 1/2 feet. One inch is equal to 2.54 centimeters. Converting 77 centimeters to inches requires dividing the number of centimeters by 2.54 centimeters per inch.
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