Free printable practice
Subtract Vertical Within 20 Practice Activities
Printable Nursery, LKG and UKG activities for practising vertical subtraction within 20 using clear columns, counting back, and careful number formation.
Practice that builds confidence
Understanding the vertical format
These Subtract Vertical Within 20 worksheets help Nursery, LKG and UKG children practise taking away numbers from totals up to 20 in a neat top-and-bottom layout. Children learn to read the minus sign, start with the larger number, and write the answer in the correct place.
The printable activities include simple vertical sums, number support, and space for careful working. They are suitable for early maths practice at home, revision after class teaching, or small-group work when children are beginning subtraction.
Vertical subtraction shows one number written above the other, with a minus sign and a line for the answer. For young learners, the main skill is not only finding the difference, but also noticing where each digit belongs. In sums within 20, children may see facts such as 9 - 4, 14 - 3, or 18 - 6, all arranged so they can work down the column.
Building subtraction within 20
The practice moves children from familiar take-away thinking to written maths. They can use fingers, counters, beads, buttons, or a number line to count back. As confidence grows, they begin to remember small subtraction facts and recognise patterns, such as subtracting 0 leaves the number unchanged and subtracting 1 gives the number just before it.
Parent routine for home practice
Sit with your child and read each sum aloud: “Sixteen take away four.” Ask the child to show 16 objects, remove 4, and then write the answer below the line. After a few sums, encourage mental counting back: “Start at 16, count back four steps.” Keep the focus on accuracy, neat digits, and saying the full number sentence, for example, “16 - 4 = 12.”
Classroom uses for teachers
Teachers can use these sheets after concrete subtraction lessons, in maths centres, for quick revision, or as independent practice while observing pencil grip and number formation. The vertical layout also makes it easy to spot whether a child understands the operation or is simply copying digits. Pair work can be useful: one child reads the sum while the other solves and explains.
Common errors to watch for
Children may subtract the top number from the bottom number, ignore the minus sign, reverse digits in teen numbers, or write the answer outside the answer space. Some may count the starting number as the first step when counting back. A helpful reminder is: “Stand on the first number, then jump back only the number being taken away.”
Free printable PDF download
Use this subtract vertical within 20 worksheet page to preview the activity, print it, or download it as a PDF for quick practice. It works well for homework, homeschool lessons, tutoring, morning work, revision, and classroom centers.
Answers and answer key support
After the child completes the worksheet independently, parents and teachers can use the answer support or answer key information to check the work, review mistakes, and choose the next practice step.
Why iBloom worksheets help
iBloom worksheets keep the page clear and age-appropriate so children can concentrate on the subtraction idea. The repeated vertical format builds familiarity, while sums within 20 stay suitable for Nursery, LKG and UKG learners. A child-friendly strategy is: read it, make it, take it away, count what is left, then write it neatly.
Helpful answers
Frequently asked questions
What does vertical subtraction within 20 mean?
It means subtraction sums are written one number above the other, with answers up to 20 or using starting numbers within 20. Children solve by taking away and writing the answer below the line.
Are these worksheets suitable for UKG children?
Yes. They are designed for Nursery, LKG and UKG learners who are beginning written subtraction and need practice with clear vertical sums within 20.
Should children use objects while solving these sums?
Yes, especially at the beginning. Counters, beads, buttons, fingers, or drawings help children see what “take away” means before they rely on mental counting.
How can I help if my child writes teen numbers backwards?
Say the number aloud, show it with objects as ten and some more, and trace the digits slowly. For example, 14 is one ten and four ones, written with 1 first and 4 next.
What mistake is most common in vertical subtraction?
Many children forget which number to start with or count the starting number as the first backward step. Remind them to stand on the first number, then count back the number after the minus sign.
Is this subtract vertical within 20 worksheet free?
Yes. You can preview it for free and use the printable worksheet for home or classroom practice.
Can I download this subtract vertical within 20 worksheet as a PDF?
Yes. Use the worksheet download option to save a printable PDF, or print the worksheet directly from the page.
Does this subtract vertical within 20 worksheet include answers or an answer key?
When the activity has fixed answers, iBloom includes answer support so parents and teachers can check the completed worksheet.