Stack the numbers so the digits are in columns according to their place value. Regroup when needed. Subtract starting with the column on the right and go left. Practice Problems. You're all done. Method 5. Write down the problem. Write it down. Turn the whole number into a fraction with the same denominator as the fraction. You'll want to convert the number 5 into a fraction with the denominator of 4 in order to subtract the two numbers.
Then, you can multiply both the top and bottom of the new fraction by 4 in order to create two fractions with the same denominator. This fraction is really equal to 5, but it allows you to subtract two fractions. Rewrite the problem. Subtract the numerators of the fractions while keeping the denominator the same. Now, you can simply subtract 3 from 20 to get the final answer. You can keep the denominator as it is.
Write your final answer. If you'd like to state it as a mixed number, simply divide 17 by 4 to get 4, with 1 left over as the remainder. Method 6. Write the first set of terms above the second. Subtract like terms. When you're working with variables, you can only add or subtract terms that have the same variable and which are written to the same degree.
This means that you can subtract 4x 2 from 7x 2 , for example, but not 4x from 4y. State your final answer. Now that you've subtracted all of the like terms you can subtract, all you can do is state your final answer, which will contain each of the terms that you subtracted. What about subtracting larger numbers from smaller numbers? For example, 1. Is there an easy way to do this, going into negatives? You subtract the smaller number from the larger number and put a negative sign in front of the answer.
Not Helpful 4 Helpful Do it the way it's shown above with two-digit numbers, but continue the same process into the hundreds column. Not Helpful 3 Helpful When the top number is a 0, you go to the next number to the left, borrow 1 from that number, and turn the 0 into a Not Helpful 7 Helpful If the bottom number is zero, there is no need to change the top number by borrowing. Subtracting zero does nothing to the top number. Not Helpful 5 Helpful For example, subtracting a positive 2 from a negative 4 results in a negative 6.
For example, subtracting a negative 3 from a negative 5 means you add 3 plus 5 to give 8, and put a minus sign in front: Instead of using the borrow method of subtracting, how do I use the method of adding up the smaller numbers until I get to the bigger number and then adding all of those numbers together? You're suggesting a method that is much more time-consuming than regular subtraction.
Keep practicing the "borrow method. Not Helpful 5 Helpful 4. Give the other number a decimal point, too, and subtract as usual. For example, if you're subtracting Not Helpful 1 Helpful 7. The answer is too long for this format. Once you're done and want more, go and generate as many examples of long subtraction problems as you wish with the show steps mode of our long subtraction calculator. Long subtraction of two numbers with decimal places is very similar to what we've just seen in the case of two whole numbers.
The key step is to align the numbers correctly. As before, the numbers have to be aligned by place value. For instance, if we want to subtract As you can see, the numbers we're dealing with have the same number of decimal places, so it was easy to align them, wasn't it?
But what to do with numbers that have a different number of decimal places? Just remember to put the numbers such that the decimal points are aligned. You can then fill in the missing decimal places with zeros. For instance, if we want to calculate Once you've written down the numbers correctly, perform the subtraction using the method explained in the previous sections.
When you arrive at the decimal point, put the point in the result row and proceed. Enter two numbers. Our long subtraction calculator will subtract the smaller number from the larger one. The calculator returns the result in a fraction of a second. Look for it beneath the numbers you've entered. Turn on the show steps option if you want the long subtraction calculator to show the step-by-step solution of your long subtraction problem.
Embed Share via. Table of contents: Long subtraction method How to borrow in long subtraction? How to do long subtraction of decimal numbers? How to use this long subtraction calculator? If Yes , If Yes , subtract the numbers, write the answer below the column between the lines.
Lesson Slides It is possible to subtract decimals from each other, as well as to subtract more than two numbers. The slider below shows another real example of how to do long subtraction. Open the slider in a new tab. Did you spot a typo?
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