🧱 Tens and Ones – Building Numbers Step by Step
Imagine numbers are made of small building blocks. Some blocks are small (ones), and some are bigger (tens). When we put them together, we can build any number!
📌 What are Ones?
Ones are single units. Each object counts as one.
Example:
🍎 = 1 🍎🍎 = 2 🍎🍎🍎 = 3
📌 What are Tens?
A ten is a group of 10 ones.
Example:
10 = 1 ten 20 = 2 tens
🧠 How Numbers Are Built
Every number greater than 9 is made of tens and ones.
Examples:
- 12 = 1 ten + 2 ones
- 15 = 1 ten + 5 ones
- 23 = 2 tens + 3 ones
- 30 = 3 tens + 0 ones
🏗 Build the Number
Let’s build numbers like a construction game!
- 1 ten + 4 ones = ___
- 2 tens + 3 ones = ___
- 3 tens + 0 ones = ___
- 1 ten + 9 ones = ___
- 2 tens + 7 ones = ___
🔍 Break the Number
Now do the opposite — break numbers into tens and ones.
- 14 = ___ tens and ___ ones
- 25 = ___ tens and ___ ones
- 30 = ___ tens and ___ ones
- 19 = ___ tens and ___ ones
- 21 = ___ tens and ___ ones
🎯 Challenge Round
Think carefully!
- Which number has 2 tens and 5 ones?
- Which number has 1 ten and 0 ones?
- Which number has 3 tens and 2 ones?
- Which number has 0 tens and 7 ones?
📘 Answers
Build the Number
- 14
- 23
- 30
- 19
- 27
Break the Number
- 1 ten, 4 ones
- 2 tens, 5 ones
- 3 tens, 0 ones
- 1 ten, 9 ones
- 2 tens, 1 one
Challenge Round
- 25
- 10
- 32
- 7
💡 Final Message
Great job! Now you understand how numbers are built. Tens and ones are the foundation of all bigger numbers.
Once you master this, addition and subtraction become much easier.
⬅ Back to Ordinal NumbersMath is like building — strong basics make everything easier!
Download Free Worksheet
Download a printable worksheet to practice tens and ones at home or in the classroom.
Download PDF WorksheetWhy Practice Tens and Ones?
This free lesson on place value with tens and ones is designed for first grade and early elementary students. It combines clear explanations, examples, and exercises children can solve at their own pace.
Understanding place value builds a strong foundation for harder math topics later. Parents and teachers can use this page in class or at home as supplementary practice.
After the lesson, children can download worksheets or play linked interactive games to reinforce the same skill through repetition and visual learning.
Lesson Benefits
- Simple explanations for young learners
- Practice exercises with answers included
- Printable worksheet available
- Links to free online math games
- No registration required
Frequently Asked Questions
Is this lesson free?
Yes, all lessons on IloveMath are free.
What age is it for?
Mainly first grade and early elementary school.
How long should practice take?
10–15 minutes per session is usually enough.