Tens and ones

Written by Adi Ackerman, Head Teacher

"Tens and ones" is written for Kindergarten (Ages 3-6), and it covers Common Core K.NBT.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 tens ones never quite stuck, this is a short review rather than busywork.

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Tens and ones
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Free printable kindergarten tens and ones worksheet. Students break two-digit numbers into tens and ones. Aligned to K.NBT.A.1. Part of our tens ones 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 tens ones worksheets work well as daily practice, homework, or a focused review activity.

What students will practice

  • Students will recognize and apply tens ones concepts using counting objects, ten-frames, and pictures.
  • Students will solve problems involving tens ones with increasing accuracy and confidence.
  • Students will connect tens ones skills to real-world situations and explain their reasoning clearly.


Curriculum Links

Common Core State Standards

Number and Operations in Base Ten · Kindergarten

K.NBT.A.1

Standard: Compose and decompose numbers from 11 to 19 into ten ones and some further ones, and understand that these numbers are composed of ten ones and one, two, three, four, five, six, seven, eight, or nine ones.

View all K.NBT.A.1 worksheets →

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FAQ

How do I use this tens ones 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 tens ones worksheets work well as daily practice, homework, or a focused review activity.

What does this worksheet teach?

These tens ones 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 tens ones from every angle. Each worksheet is designed to build on prior knowledge while introducing the level of challenge appropriate for Kindergarten. Practicing tens ones at this stage strengthens the mathematical foundations that support more advanced concepts in later grades.

Can I use this tens ones worksheet for homeschool or classroom?

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 tens ones. In class it runs well as independent work while you pull a small group. Print one copy or thirty, whichever the day needs.

What does learning tens and ones teach kindergartners?

Tens and ones is an introduction to place value-the idea that a digit's position in a number determines its value. Understanding that 34 means 3 groups of ten and 4 leftover ones helps children make sense of how our number system works and why numbers are written the way they are.

When do kindergartners start learning about tens and ones?

Place value concepts are typically introduced in the second half of kindergarten, once children are comfortable counting to 20 and beyond. Teachers begin with hands-on materials like linking cubes or base-ten blocks before moving to pictures and written symbols.

How can I reinforce tens and ones at home?

Use everyday objects like dried beans or pennies. Have your child group them into piles of ten, then count the leftovers. Ask, 'How many tens do we have? How many ones?' and write the number together.

Which Common Core standard covers tens and ones in kindergarten?

This skill aligns with CCSS.MATH.CONTENT.K.NBT.A.1, which requires kindergartners to compose and decompose numbers from 11 to 19 into ten ones and some further ones using objects or drawings.

When do kindergarteners learn to count to 100?

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?

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?

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

GradeKindergarten
SubjectMath
TopicCounting
StandardK.NBT.A.1
Pages2 pages
DifficultyMedium

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