Preschool Subtraction Worksheets: Hi kids! Ready to do some fun subtraction…! In subtraction you always have to take away the smaller number from the bigger number. Look at the following problems! They are vertical subtractions. The first number, which is on the top is always bigger than the second number, which is on the bottom. Draw the first or the top number of lemons and cut the second or the bottom number of lemons. Now, count how many lemons are left. This is the answer. Enjoy Preschool Subtraction Worksheets!