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To round numbers in math, determine whether the second digit in the number is more than five or less than five. Round up for numbers more than five and down for numbers four and fewer. Round numbers to the nearest 10, 100 or 1000 with help from a math teacher in this free video math lesson.
Find the mean of a series of numbers by adding all of the numbers together and dividing by the amount of numbers in the series. Learn how the average of numbers is the same as the mean with information from a math teacher in this free video math lesson.
There are many famous math inventors including Gottfried Wilhelm Leibniz and Isaac Newton, who helped develop calculus; Pythagoras, who developed the Pythagorean theorem; and John Napier, who developed logarithms. Discover the contributions made to the math world by the Greeks, Babylonians and Egyptians with information from a math teacher in this free video on math history.
Famous mathematicians include Euclid, who developed a variety of geometric concepts; Isaac Newton, who is one of the forefathers of calculus; and Pythagoras, who developed the Pythagorean theorem. Learn more about famous mathematicians, like Fibonacci and Hypatia, with information from a math teacher in this free video on math history.
Famous women mathematicians include Hypatia, who worked with ellipses, circles and hyperbolas; Florence Nightingale, who worked extensively with statistics; and Winifred Edgerton, who was the first American woman to receive a Ph.D. in mathematics. Find out more about women mathematicians, such as Theano, wife of Pythagoras, with information from a math teacher in this free video on math history.
Numbers were first recorded around 30,000 BC as tally marks and eventually evolved into a number system by the Mesopotamians and the Egyptians between 3400 BC and 3100 BC. Find out how negative numbers were developed in China and irrational numbers were developed in India with information from a math teacher in this free video on math history.
The number system used today, known as the base 10 number system, was first invented by the Egyptians around 3100 BC. Find out how the Hindu-Arabic number system helped shape the current number system with information from a math teacher in this free video on math history.
The number zero was a known concept for many years, but did not have any definition or rules until Aryabhata introduced the zero digit in India. Find out how the Mayan number system used the number zero, but in a way that did not translate to base 10 numbers, with information from a math teacher in this free video on math history.
A radical sign, which looks like a check mark with a roof, is used to indicate what number multiplied by itself a certain number of times will give the final answer. Calculate the square root or cubed root of a number with a radical sign using help from a math teacher in this free video math lesson.
To solve division problems, determine if the divisor will go into the dividend, multiply, subtract, bring down the remainders and repeat until the problem is complete. Solve division problems with help from multiplication tables using advice from a math teacher in this free video math lesson.
Solving equations by substitution requires substituting a known variable value from one equation for the unknown variable of a different equation. Change an equation with substitution in order to work with a single variable using help from a math teacher in this free video math lesson.
Find the average of a series of numbers by adding all of the numbers together and dividing by the amount of numbers in the series. Use simple addition and division to find the average of a set of numbers with help from a math teacher in this free video math lesson.
Find the mean of a series of numbers by adding all of the numbers together and dividing by the amount of numbers in the series. Learn how the average of numbers is the same as the mean with information from a math teacher in this free video math lesson.
Find the median of a series of numbers by ordering the numbers from lowest to highest and finding the number in the middle. If there is an even amount of numbers in a series, determine the average of the two middle numbers to find the median. Learn more about finding the median with information from a math teacher in this free video math lesson.
Find the reciprocal of a whole number by placing the number over one and flipping the numerator and denominator to create the reciprocal fraction. Find out how zero is the only number that does not have a reciprocal with information from a math teacher in this free video math lesson.
To simplify rational exponents, determine the common denominator for the exponent fractions, add the fractions together and multiply the bases. Solve a math problem with rational exponents using instructions from a math teacher in this free video math lesson.
Solve math problems with exponents by taking exponent numbers with the same base and adding or subtracting the exponents. Use addition if the base is being multiplied and subtraction if the base is being divided. Learn more about doing exponents with information from a math teacher in this free video math lesson.
To do radical expression math equations, determine what number, in relation to the expression, can form a perfect square. Solve radical expression problems by using multiplication tables with help from a math teacher in this free video math lesson.
When evaluating mathematical expressions, substitute the given numbers for variables, and complete the functions of the equation. Learn to substitute numerals for variables to solve algebraic equations with help from a math teacher in this free video math lesson.
Convert whole numbers to percentages by placing a decimal point after the number, and then shifting the decimal point two places to the right. Fill the empty space behind the number with zeros to determine the percentage using help from a math teacher in this free video math lesson.
Dividing by zero in a math problem is impossible because it does not logically make any sense. Learn more about how a number cannot be divided by zero with information from a math teacher in this free video math lesson.
Divide equations by determining the least common denominator for the fractions, canceling out common denominators and completing the division process with whole numbers. Solve an algebraic equations using division with help from a math teacher in this free video math lesson.
Dividing polynomials requires simplifying the terms of the fraction using multiplication and then completing the division equation. Watch an example of a problem requiring division of polynomials with help from a math teacher in this free video math lesson.
To factor equations, determine what the two terms of an equation have in common, pull out the common factor and use parenthesis to combine the left over equation. Solve an equation after it has been factored with help from a math teacher in this free video math lesson.
Composite numbers are integers greater than one that possess multiple factors. A composite number can also be defined as any number that is not a prime number. Learn about some examples of composite numbers, such as 10, 12 and 15, with information from a math teacher in this free video math lesson.
Mathematics is the body of knowledge and the academic discipline that studies concepts such as quantity, structure, space and change. Mathematics education is a term that refers both to the practice of teaching and learning mathematics, as well as to a field of scholarly research on this practice. At different times and in different cultures and countries, mathematics education has attempted to achieve a variety of different objectives, including the teaching of basic numeracy skills to students and teaching both practical and abstract mathematics. In this free video series on math, an experienced math teacher explains math problems and history. Get information on who invented numbers, famous mathematicians and famous female mathematicians. Learn how to solve algebra equations, division problems and radicals. Get tips on factoring equations and dividing polynomials. Improve math skills with the help of these free videos.
Jimmy Chang Jimmy Chang has been a math teacher at St. Pete College for more than nine years. He has a Master's Degree in math and his specialties include calculus, algebra, liberal arts math and trigonometry. Chang was the campus coordinator for St. Pete College's honors college for several years.dkdk
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