Basic Math Skills : Rounding Decimals
Sunday, September 13th, 2009
When rounding decimals, round up to the next digit in the sequence if the digit is equal to or greater than five. Round decimals to specific decimal places using tips from a math tutor in this free video on math skills.
Expert: Alex Martinez
Bio: Alex Martinez grew up in western Massachusetts and is currently a mechanical engineering student at the University of Massachusetts at Amherst. He’s set to graduate in 2009 with a Bachelor of Science.
Filmmaker: David Pakman
Duration : 0:1:28
In this video, I’ll show you how to add and subtract fractions with different denominators. This process is very different when the denominators are different, but with practice can be just as easy as when the denominators are the same.
http://www.mathproblemgenerator.com - How to Subtract Fractions with Uncommon Demoninators. For more practice and to create math worksheets, visit Davitily Math Problem Generator at
A mixed number is a number that contains both whole numbers and fractions. Change mixed numbers into decimals by creating a simple fraction and turning the fraction into a percentage with tips from a math teacher in this free video math lesson.
Access full lesson containing this video at: http://www.yourteacher.com/prealgebra/multiplyfractions.php Students learn to multiply fractions by multiplying across the numerators, and multiplying across the denominators. For example, to multiply 1/2 x 3/7, multiply across the numerators, 1 x 3 = 3, and multiply across the denominators, 2 x 7 = 14. So 1/2 x 3/7 = 3/14. Students also learn to cross-cancel when multiplying fractions. For example, to multiply 3/5 x 5/9, the 3 and 9 cross-cancel to 1 and 3, and the 5 and 5 cross-cancel to 1 and 1. Therefore, 3/5 x 5/9 can be rewritten as 1/1 x 1/3, and multiplying across the numerators and denominators, 1/1 x 1/3 = 1/3.
Access full lesson containing this video at: http://www.yourteacher.com/prealgebra/roundingdecimals.php Students learn to round a decimal to a given place using the following steps. First, find the digit in the rounding place. Next, look at the digit to the right of the rounding place. If the digit to the right of the rounding place is less than 5, round down, which means that the digit in the rounding place stays the same, and all digits to the right of the place become zero. If the digit to the right of the rounding place is greater than 5, round up, which means add 1 to the digit in the rounding place, and all digits to the right of the rounding place become zero.
Taking the square root of a perfect square.
More at http://www.mathtv.com
Students learn to divide fractions by first changing the division sign to multiplication and flipping the second fraction. For example, to simplify 7/12 divided by 7/9, first change the division sign to multiplication and flip the second fraction, to get 7/12 x 9/7. Next, multiply the fractions by first cross-canceling, then multiplying across the numerators and across the denominators.
Division with decimals is tricky because not only do you have to put the decimal in the right place in your answer, but often you have to move around decimals before you can even solve the division problem. In this lesson, I show how to make this tricky process a bit easier.