Activities on Understanding Tens and Ones in Grade 1

Master understanding tens and ones: place value, base ten system, number recognition activities designed for young learners.

Concepts and Definitions
🔟 Tens & Ones Grade 1 🔟
10
Ten = 10 ones
1
One = 1 unit
15
1 ten + 5 ones
Key Definitions:

Tens: Groups of 10 ones (10, 20, 30...)

Ones: Individual units (1, 2, 3...)

Place Value: Where a digit sits tells its value

Base Ten: Our number system uses groups of 10

Grade 1 Level: Working with numbers up to 100

Number Sense: Understanding relationships between numbers

Number = (Tens × 10) + Ones
Place Value Formula
Grade 1 Strategy:
  1. Look at the number: Identify the total
  2. Count tens: How many groups of 10 fit?
  3. Count ones: How many left over?
  4. Write breakdown: Number = tens + ones
Tip 1: Count by tens first (10, 20, 30...)
Tip 2: Use your fingers to group by 10!
Tip 3: Draw circles in groups of 10.
Important: Every number can be broken into tens and ones.
Remember: 10 ones = 1 ten.
Activities: Level 1-3
1 Identifying Tens
Activity 1: Identifying Tens
Look at the number 20. How many tens and ones does it have?
Activity Goal:

Identification: Recognizing tens in numbers

How to Complete:
  1. Look at the number (20)
  2. Count how many tens (2 tens = 20)
  3. Count how many ones (0 ones)
  4. Write: 20 = 2 tens + 0 ones
10
10
Number
20
Tens
2
Ones
0
Step 1: Look at the number

We have the number 20

Step 2: Count the tens

How many groups of 10 are in 20? 2 groups

Step 3: Count the ones

After taking out 20, we have 0 left

Step 4: Write the breakdown

20 = 2 tens + 0 ones

20 = 2 tens + 0 ones
Activity Result:

20 has 2 tens and 0 ones

Grade 1 Rules:

• Grouping: Count by tens first

• Place value: Tens and ones positions

• Zero concept: Zero means none

2 Identifying Ones
Activity 2: Identifying Ones
Look at the number 17. How many tens and ones does it have?
Activity Goal:

Identification: Recognizing ones in numbers

10
1
1
1
1
1
1
1
Number
17
Tens
1
Ones
7
Step 1: Look at the number

We have the number 17

Step 2: Take out groups of 10

How many tens are in 17? Only 1 group of 10

Step 3: Count remaining ones

After taking out 10, we have 7 ones left

Step 4: Write the breakdown

17 = 1 ten + 7 ones

17 = 1 ten + 7 ones
Activity Result:

17 has 1 ten and 7 ones

Grade 1 Rules:

• Subtraction: 17 - 10 = 7

• Remainder: Leftover after grouping by 10

• Place value: Tens and ones positions

3 Mixed Practice
Activity 3: Mixed Practice
Break apart these numbers: 25, 34, 41. How many tens and ones in each?
Activity Goal:

Mixed Practice: Applying concepts to various numbers

Problem 1: 25 = ? tens + ? ones

25 has 2 tens (20) and 5 ones (5)

Problem 2: 34 = ? tens + ? ones

34 has 3 tens (30) and 4 ones (4)

Problem 3: 41 = ? tens + ? ones

41 has 4 tens (40) and 1 one (1)

25
2T+5O
34
3T+4O
41
4T+1O
Step 1: Analyze first number (25)

25 = 2 tens + 5 ones

Step 2: Analyze second number (34)

34 = 3 tens + 4 ones

Step 3: Analyze third number (41)

41 = 4 tens + 1 one

Step 4: Verify all answers

20+5=25, 30+4=34, 40+1=41 ✓

25=2T+5O, 34=3T+4O, 41=4T+1O
Activity Results:

25: 2 tens + 5 ones, 34: 3 tens + 4 ones, 41: 4 tens + 1 one

Grade 1 Rules:

• Systematic approach: Work left to right

• Verification: Check each answer

• Pattern recognition: Tens digit, ones digit

Activities: Level 4-5
4 Building Numbers
Activity 4: Building Numbers
If you have 3 tens and 6 ones, what number do you make?
Activity Goal:

Composition: Building numbers from tens and ones

10
10
10
1
1
1
1
1
1
Given
3T+6O
Calculate
30+6
Result
36
Step 1: Identify what you have

You have 3 tens and 6 ones

Step 2: Calculate the tens

3 tens = 3 × 10 = 30

Step 3: Calculate the ones

6 ones = 6 × 1 = 6

Step 4: Add them together

30 + 6 = 36

3 tens + 6 ones = 36
Activity Result:

3 tens and 6 ones make the number 36

Grade 1 Rules:

• Multiplication: Tens × 10

• Addition: Combine tens and ones

• Composition: Parts make whole number

5 Challenge Activity
Activity 5: Challenge Activity
Word problems:
Tom has 2 tens and 5 ones. How many does he have total?
Sarah has 43 marbles. How many tens and ones does she have?
What number has 5 tens and 0 ones?
Activity Goal:

Application: Using tens and ones in real contexts

Tom's Problem: 2 tens + 5 ones = ?

2 tens = 20, 5 ones = 5, so 20 + 5 = 25

Sarah's Problem: 43 = ? tens + ? ones

43 has 4 tens (40) and 3 ones (3)

Third Problem: 5 tens + 0 ones = ?

5 tens = 50, 0 ones = 0, so 50 + 0 = 50

Tom
25
Sarah
4T+3O
Third
50
Step 1: Solve Tom's problem

2 tens + 5 ones = 25 total

Step 2: Solve Sarah's problem

43 = 4 tens + 3 ones

Step 3: Solve third problem

5 tens + 0 ones = 50

Step 4: Check all solutions

All answers verified and correct!

Tom: 25, Sarah: 4T+3O, Third: 50
Challenge Results:

Tom has 25, Sarah has 4 tens + 3 ones, answer is 50

Grade 1 Rules:

• Word problems: Identify key information

• Application: Use place value in real contexts

• Verification: Check solutions make sense

Understanding Tens and Ones Grade 1: Complete Guide

What Are Tens and Ones?

Tens are groups of 10 ones. When you have 10 individual units, we bundle them together to make 1 ten.

Ones are individual units that don't make a full group of 10.

Grade 1 Level Expectations

By the end of grade 1, students should be able to:

  • Identify tens and ones in numbers up to 100
  • Compose numbers from tens and ones
  • Decompose numbers into tens and ones
  • Understand place value relationships
  • Apply concepts to word problems
  • Use visual representations effectively

Developmental Progression

Level 1: Teen numbers (11-19) - clear tens + ones
Level 2: Numbers 20-39 - building confidence
Level 3: Numbers 40-69 - increasing complexity
Level 4: Numbers 70-99 - advanced practice
Level 5: Mixed problems and word problems

Grade 1 Teaching Strategies

Concrete Manipulatives: Use base ten blocks, counters, or other objects

Visual Representations: Draw tens and ones, use place value charts

Verbal Reinforcement: Say "___ tens and ___ ones" aloud

Gradual Release: Start with guided practice, move to independent

Common Grade 1 Challenges

  • Mixing up tens and ones positions
  • Difficulty with zero in ones place
  • Struggling with larger numbers
  • Transitioning from concrete to abstract

Support Strategies

  • Use consistent visual aids
  • Provide frequent practice
  • Connect to real-world examples
  • Encourage multiple representations

Key Learning Objectives

  • Recognize that two-digit numbers are composed of tens and ones
  • Fluently decompose numbers into tens and ones
  • Compose numbers from given tens and ones
  • Understand the relationship between tens and ones
  • Apply concepts to solve word problems
  • Build foundation for future math concepts

Assessment Indicators

  • Accurately identifies tens and ones in numbers
  • Composes numbers from given parts
  • Decomposes numbers correctly
  • Applies concepts to word problems
  • Demonstrates understanding through explanation
  • Shows fluency with numbers up to 100

Questions & Answers

Question: Why do we need to learn about tens and ones? Can't I just count regular numbers?

Answer: Great question! Learning about tens and ones helps your brain understand how numbers work, just like learning the alphabet helps you read words!

  • It makes adding and subtracting much easier: 23 + 15 becomes (20 + 10) + (3 + 5) = 38
  • It helps you understand bigger numbers later
  • It makes mental math faster and more accurate
  • It's the foundation for all future math

Think of it like organizing your toys - it's easier to count and find what you need when things are grouped together!

Question: My child is struggling with the concept of tens and ones. How can I help at home?

Answer: Here are effective home strategies:

  • Use everyday objects: bundle 10 straws together, group 10 coins
  • Practice with real numbers: count items in groups of 10
  • Play games: number card matching, place value bingo
  • Use visual aids: draw tens and ones, use base ten blocks
  • Be patient and encourage: celebrate small successes

The key is making it hands-on and fun! Regular practice with concrete materials helps build understanding.

Question: What are some effective activities for reinforcing tens and ones understanding?

Answer: Here are proven activities:

  • Base ten block buildings: Construct numbers with physical blocks
  • Number line jumps: Jump by tens and ones
  • Place value mats: Organize tens and ones systematically
  • Counting collections: Group items by tens
  • Interactive games: Digital or physical matching games

Variety helps maintain engagement while reinforcing the core concepts!