Math Student Help

Important rules to remember when adding, subtracting, multiplying, or dividing fractions!

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Access full lesson containing this video at: http://www.yourteacher.com/algebra1/addingandsubtractingrationalexpressions.php Students learn that when adding rational expressions, the first step is to factor each of the denominators, if possible, then give each term a common denominator by multiplying the numerator and denominator of each term by the appropriate value. Next, add across the numerators and keep the denominators the same. Finally, factor the resulting numerator, if possible, to determine if the rational expression can be reduced.

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Access full lesson containing this video at: http://www.yourteacher.com/prealgebra/leastcommondenominator.php Students learn to add unlike fractions by first finding a common denominator. For example, to add 1/2 + 1/3, first find the common denominator of 2 and 3, or the Least Common Multiple of 2 and 3, which is 6. Then multiply the numerator and denominator of 1/2 by 3, to get the equivalent fraction 3/6, and multiply the numerator and denominator of 1/3 by 2, to get the equivalent fraction 2/6. Next, add the like fractions, 3/6 + 2/6, to get 5/6. So 1/2 + 1/3 = 5/6. Students also learn to subtract unlike fractions by following the same process that is used when adding unlike fractions.

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Access full lesson containing this video at: http://www.yourteacher.com/prealgebra/addingdecimals.php Students learn to add decimals by first lining up the decimal points, then adding the numbers by column. For example, to add 14.2 + 2.86, first line up the decimal points, then add the digits in the hundredths column, to get 0 + 6, or 6, then add the digits in the tenths column, to get 2 + 8, or 10, so write a 0 in the tenths column and carry the 1 to the units column, then add the digits in units column, to get 1 + 4 + 2, or 7, then add the digits in the tens column, to get 1. So 14.2 + 2.86 = 17.06.

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ADDING AND SUBTRACING IS EASY BABY! -mr nystrom

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Access full lesson containing this video at: http://www.yourteacher.com/prealgebra/decimalwordproblems.php Students learn to solve word problems that involve adding or subtracting decimals. For example: Margaret is mailing three letters that weigh 3.7 oz., 2.913 oz., and 2.82 oz. What is the combined weight of the letters?

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Adding and Subtracding Fractions - Numerical Examples. In this video, I do a few examples of adding and subtracdting fractions.
For more free math videos, visit http://JustMathTutoring.com

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Access full lesson containing this video at: http://www.yourteacher.com/geometry/subtractingintegers.php Students review the addition and subtraction of integers using a number line, where a positive integer represents a move to the right, and a negative integer represents a move to the left. Students learn that minus a negative can be thought of as plus a positive.

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Access full lesson containing this video at: http://www.yourteacher.com/algebra1/addingfractions.php Students learn to add or subtract fractions using the least common denominator, which is the least common multiple for the denominators of the fractions. Once the fractions are given a common denominator by multiplying the numerator and denominator of each fraction by the appropriate number, then the fractions can be added or subtracted by adding or subtracting the numerators, and leaving the denominator the same.

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Ernie sings “The number one is not my favorite number” to an increasingly crowded room, much to the chagrin of Bert.

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