Worksheets Crafter: Two digit subtraction involves subtracting a two digit number from another two digit number. To do this, line up the numbers vertically with the ones digit under the ones digit and the tens digit under the tens digit. Start by subtracting the ones place, just like you would with single digit subtraction. If the top number's ones place is smaller than the bottom number's ones place, borrow one from the tens place to add to the top number. Then, subtract the tens place. If the top number's tens place is smaller than the bottom number's tens place, borrow one from the hundreds place to add to the top number. Finally, subtract the tens place. Double check your work to make sure your answer is correct. Practice this method with different numbers to improve your skills in two digit subtraction.