Video transcriptLet's add 19 and 3/18 to 18 and 2/3. So I like to separate out the whole number parts from the fraction parts. So 19 and 3/18 is the same thing as 19 plus 3/18. And to that, we are going to add 18 and 2/3, which is the same thing as 18 plus 2/3. Now we can separately add the whole number parts. So we could add the 19 to the 18. So we could do 19 plus 18. And then we can add the fraction parts-- let me do this in green-- plus 3/18 plus 2/3. Now 19/18, pretty straightforward. That is what? Let's see. 19 plus 19 would be 38. So this is going to be 1 less than that. It's going to be 37. So that gives me 37. And then 3/18 plus 2/3, to add them, I need to have the same denominator. And the least common multiple of 18 and 3 is 18. So let's convert 2/3 to something over 18. So 2/3, if I want to write it as something over 18, well, I multiplied the denominator by 6, so I'd also have to multiply the numerator by 6. So it's the same thing as 12/18. So I can rewrite 2/3 as 12/18. And now I can add these two things together. That's going to be-- so I have 37 plus-- it's going to be something over 18-- plus something over 18. 3 plus 12 is 15, plus 15/18. And so expressing this as a mixed number, I get 37 and 15/18. And that's the right number. But we can simplify it even more. We can simplify the 15/18. Both the numerator and the denominator are divisible by 3. So let's divide them both by 3. And we're not changing the value because we're doing the same thing to the numerator and the denominator. And so this gives us, we still have our 37, but the numerator is now 5, and the denominator is now 6. So we get 37 and 5/6. And we're done. Show Download Article Download Article Subtracting fractions from whole numbers isn't as hard as it looks. There are two main ways to go about it: you can either convert the whole number into a fraction, or subtract 1 from that whole number and convert the 1 into a fraction with the same base as the fraction you're subtracting from it. Once you have two fractions with the same base, you can start to subtract. Both methods will help you.
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ReferencesAbout This ArticleArticle SummaryX To subtract a fraction from a whole number, start by converting the whole number to a fraction. Do this by giving the whole number a denominator of 1. For instance, if you’re subtracting 4/5 from 8, convert 8 into the fraction 8/1. Next, multiply the new fraction’s numerator and denominator by the denominator of the fraction that you’re subtracting. In our example, you’d multiply 8/1 by 5 to get 40/5. Now you have two like fractions—that is, two fractions that share the same denominator. Carry out the subtraction problem using just the numerators of the two fractions. In this example, 40-4 = 36. Write the difference between the two numerators over the common denominator to get 36/5. If you want to convert the answer to a mixed fraction, divide the numerator by the denominator. The quotient will become the new whole number, while the remainder will become the numerator of the new fraction. In this case, 36/5 = 7 with a remainder of 1, giving you the mixed fraction 7 and 1/5. For a trick to help subtract a fraction from a very large whole number, read on! Did this summary help you? Thanks to all authors for creating a page that has been read 903,694 times. Reader Success Stories
Did this article help you?How do you add fractions with a whole number?Answer: Once again, when adding fractions and whole numbers, first calculate the whole number plus the whole number, and then include the remaining fraction in the answer. For example, 45+2=47, so 4713 is the answer.
How do you add and subtract fractions with different denominators and whole numbers?Subtracting mixed fractions? You could first convert each to an improper fraction. If they don't have common denominators, then find a common denominator and use it to rewrite each fraction. Then, subtract the fractions and simplify.
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How to add and subtract fractions with whole numbers
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