Read on! Play this very quick and fun video now! Before we begin, let's revisit some basic fraction terms so you understand exactly what we're dealing with here:. We first want to find the whole number, and to do this we divide the numerator by the denominator.
Since we are only interested in whole numbers , we ignore any numbers to the right of the decimal point. Now that we have our whole number for the mixed fraction, we need to find our new numerator for the fraction part of the mixed number. To work this out we'll use the whole number we calculated in step one 1 and multiply it by the original denominator Fractions can undergo many different operations, some of which are mentioned below.
Unlike adding and subtracting integers such as 2 and 8, fractions require a common denominator to undergo these operations. One method for finding a common denominator involves multiplying the numerators and denominators of all of the fractions involved by the product of the denominators of each fraction.
Multiplying all of the denominators ensures that the new denominator is certain to be a multiple of each individual denominator. The numerators also need to be multiplied by the appropriate factors to preserve the value of the fraction as a whole. This is arguably the simplest way to ensure that the fractions have a common denominator. However, in most cases, the solutions to these equations will not appear in simplified form the provided calculator computes the simplification automatically.
Below is an example using this method. This process can be used for any number of fractions. Just multiply the numerators and denominators of each fraction in the problem by the product of the denominators of all the other fractions not including its own respective denominator in the problem. An alternative method for finding a common denominator is to determine the least common multiple LCM for the denominators, then add or subtract the numerators as one would an integer. Using the least common multiple can be more efficient and is more likely to result in a fraction in simplified form.
In the example above, the denominators were 4, 6, and 2. The least common multiple is the first shared multiple of these three numbers. The first multiple they all share is 12, so this is the least common multiple. To complete an addition or subtraction problem, multiply the numerators and denominators of each fraction in the problem by whatever value will make the denominators 12, then add the numerators.
Fraction subtraction is essentially the same as fraction addition. A common denominator is required for the operation to occur. To work out the fraction of any number, we first need to convert that whole number into a fraction as well. Here's a little tip for you. Any number can be converted to fraction if you use 1 as the denominator:. That's right, all you need to do is convert the whole number to a fraction and then multiply the numerators and denominators.
Let's take a look:.
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