Count to 20 and write the number
Written by Adi Ackerman, Head Teacher
"Count to 20 and write the number" is written for Kindergarten (Ages 3-6), and it covers Common Core K.CC.A.1. If your little one is a year younger but already steady on counting, the page still works. You may just need to read the instructions out loud. And if they are older and count up to 20 never quite stuck, this is a short review rather than busywork.


2 pages in this set
Free printable kindergarten counting to 20 worksheet. Students count up to 20 objects and write the number. Aligned to K.CC.B.5. Part of our count up to 20 counting collection. Aligned to Common Core standards.
How do I use this worksheet?
Before handing out the worksheet, briefly introduce the concept with a short oral warm-up or a visual model on the board. Let students work through it with your modeling first (do the first item together on the board), then try the rest with a partner, encouraging them to talk through their thinking: "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 count up to 20 worksheets work well as daily practice, homework, or a focused review activity.
What students will practice
- Students will recognize and apply count up to 20 concepts using counting objects, ten-frames, and pictures.
- Students will solve problems involving count up to 20 with increasing accuracy and confidence.
- Students will connect count up to 20 skills to real-world situations and explain their reasoning clearly.
Curriculum Links
Common Core State Standards
Counting and Cardinality · Kindergarten
Standard: Count to 100 by ones and by tens.
View all K.CC.A.1 worksheets →Find this in the curriculum
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FAQ
How do I use this count up to 20 worksheet?
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Before handing out the worksheet, briefly introduce the concept with a short oral warm-up or a visual model on the board. Let students work through it with your modeling first (do the first item together on the board), then try the rest with a partner, encouraging them to talk through their thinking: "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 count up to 20 worksheets work well as daily practice, homework, or a focused review activity.
What does this worksheet teach?
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These count up to 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 count up to 20 from every angle. Each worksheet is designed to build on prior knowledge while introducing the level of challenge appropriate for Kindergarten. Practicing count up to 20 at this stage strengthens the mathematical foundations that support more advanced concepts in later grades.
Can I use this count up to 20 worksheet for homeschool or classroom?
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Yes, both. We made it for Kindergarten counting, 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 count up to 20. In class it runs well as independent work while you pull a small group. Print one copy or thirty, whichever the day needs.
Why are teen numbers especially hard for kindergartners?
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Numbers 11-19 are difficult because English number names for teens don't follow a consistent pattern the way numbers 20 and above do. 'Eleven' and 'twelve' give no hint of the digits inside them, unlike 'twenty-one' or 'thirty-two.' Children need extra repetition specifically with the teen numbers.
When do kindergartners learn to count to 20?
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Most kindergarten classrooms target reliable counting to 20 by mid-year. Children who enter kindergarten already counting to 10 typically reach 20 within the first two months of instruction. The focus then shifts to recognizing and writing the teen numerals accurately.
How can parents help children practice counting to 20 at home?
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Count real objects together: crackers at snack time, steps up the stairs, or toys lined up on the floor. When children count physical objects rather than just reciting numbers, they develop stronger one-to-one correspondence and are less likely to skip or double-count in the teens.
When do kindergarteners learn to count to 100?
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Counting to 100 by ones and by tens is the Common Core standard K.CC.A.1, expected by the end of kindergarten. Most students reliably count to 20-30 by midyear, then use skip-counting by tens as a bridge to 100 in the spring.
What is one-to-one correspondence, and why does it matter?
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One-to-one correspondence is touching or pointing to one object for each number word said aloud (CCSS K.CC.B.4), rather than reciting numbers separately from the objects being counted. It's the skill that turns counting from a memorized chant into an understanding of quantity, and it's usually the biggest gap between a child who can count and one who can't yet tell you how many.
How can I tell if my kindergartener needs more counting practice?
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Watch for accurate counting of a small group of objects (10-20) without skipping or double-counting, and whether they can write the numerals 0-20 to match. A child who recites numbers quickly but loses track when actually counting objects needs more one-to-one correspondence practice before moving on to bigger numbers.
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Worksheet Details
| Grade | Kindergarten |
| Subject | Math |
| Topic | Counting |
| Standard | K.CC.A.1 |
| Pages | 2 pages |
| Difficulty | Medium |
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