Subtraction Within 20 Grade 1 Free PDF
Updated: August 2026
Practice single and double-digit basic subtraction facts up to 20 with this printable math worksheet. Ideal for Grade 1 students building fluency in mental math.
Grade 1
Learning math is like learning a new superpower! Once you know how numbers work, you can solve all kinds of fun puzzles. Today, we are going to practice taking numbers away, which we call subtraction . If you have 5 apples and you eat 2, how many do you have left? That is right, you have 3 apples! That is subtraction in real life.
This free printable worksheet is specially designed for 1st grade students who are getting ready to master subtraction facts up to 20. It gives children a great way to practice mental math, build confidence, and have fun with numbers every single day.
Why Is Subtraction Within 20 Important?
Before moving on to bigger math challenges like regrouping or working with three-digit numbers, children need a strong foundation in basic math facts. Practicing subtraction within 20 helps young learners in several ways:
Builds Number Sense: Kids learn how numbers relate to each other and how counting backward works.
Improves Mental Speed: Solving quick practice problems helps students remember math facts without having to count on their fingers every time.
Prepares for Word Problems: Understanding simple subtraction makes it much easier to tackle story problems in upper elementary grades.
How to Use This Worksheet at Home or in the Classroom
You can use this printable practice page in many different ways depending on what works best for your child or student:
Daily Warm-Up: Give your child one column of problems each morning to wake up their brain before school.
Timed Challenge: Set a timer for 5 minutes and see how many problems they can solve correctly. Celebrate their score to make learning exciting!
Hands-On Learning: For beginners, use small objects like buttons, blocks, or counting bears. If the problem is 12 - 4, have them count 12 blocks and take 4 away.
Tips for Parents and Teachers
Every child learns at their own pace. If a problem feels a little tricky, encourage them to use line drawings or a number line. Remind them that making mistakes is just part of learning! With steady practice, taking away numbers up to 20 will become second nature.
Click the download link above to get your free printable PDF version of this Grade 1 subtraction worksheet today!
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DAILY MATH
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