Subtraction within 20 (some borrowing)

Before handing out the worksheet, briefly introduce the concept with a short oral warm-up or a visual model on the board. Encourage students to talk through their thinking as they work: "What strategy are you using? How do you know that is right?" After completing the worksheet, review any missed problems together and discuss the reasoning rather than just the answer. For extra support, let students use manipulatives or draw pictures alongside the written problems. These subtract 1 digit within 20 worksheets work well as daily practice, homework, or a focused review activity.

These subtract 1 digit within 20 worksheets for Kindergarten give students the structured, hands-on practice they need to build confidence and fluency. Students work through a range of problem formats, from visual models and diagrams to written equations and word problems, so they encounter subtract 1 digit within 20 from every angle. Each worksheet is designed to build on prior knowledge while introducing the level of challenge appropriate for Kindergarten. Practicing subtract 1 digit within 20 at this stage strengthens the mathematical foundations that support more advanced concepts in later grades.

"Subtraction within 20 (some borrowing)" is written for Kindergarten (Ages 3-6), and it covers Common Core K.OA.A.5. Extends beyond the standard: K.OA.A.5 covers fluency within 5, this worksheet works within 20. If your little one is a year younger but already steady on subtraction, the page still works. You may just need to read the instructions out loud. And if they are older and subtract 1 digit within 20 never quite stuck, this is a short review rather than busywork.

Yes, both. We made it for Kindergarten subtraction, and the page works the same whether it lands on a kitchen table or a center rotation. At home, most families go through it together and talk the answers out loud, and that talking is where most of the learning happens with subtract 1 digit within 20. In class it runs well as independent work while you pull a small group. Print one copy or thirty, whichever the day needs.

Subtracting from teen numbers often requires children to 'cross ten,' meaning the answer may be in the single digits (e.g., 13 − 5 = 8). This challenges children to think more flexibly about numbers and is an important precursor to understanding place value and regrouping in later grades.

Two common strategies are 'count back' (start at the teen number and count backward by the single-digit amount) and 'decompose to 10' (break the teen number into 10 + something, subtract from the extra part, then combine). Both strategies are valuable and children may naturally gravitate toward one.

Use a printed or hand-drawn number line from 0 to 20 and make it a game - start at a teen number, take jumps backward, and land on the answer. Keep problems casual and praise the process rather than just the answer to keep math anxiety low.

Kindergarteners should understand subtraction as taking apart or taking from. Per CCSS K.OA.A.1, they should represent subtraction with objects, drawings, and equations within 10. Fluency is expected within 5 (K.OA.A.5).

Start with concrete objects: give your child 5 crackers and ask them to eat 2, then count what remains. Use visual worksheets that show crossed-out items before introducing number sentences. The key is connecting the physical act of removing to the minus sign.

Most children find subtraction more challenging because it requires understanding that a group is getting smaller. Research suggests introducing subtraction alongside addition so students see them as related operations. Worksheets that pair addition and subtraction facts help build this connection.