Understanding Tens and Ones Worksheets | Grade 1

Worksheet Concepts and Structure

📋 Tens & Ones Worksheets 📋

Ten = 10 ones

One = 1 unit

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

Worksheets: Structured practice sheets for skill development

Grade 1 Level: Working with numbers up to 100

Number = (Tens × 10) + Ones

Place Value Formula

Worksheet Strategy:

Read the instructions: Understand what to do
Look at the number: Identify the total
Count tens and ones: Use visual aids if needed
Fill in the blanks: Write answers clearly
Check your work: Verify answers make sense

Tip 1: Count by tens first (10, 20, 30...)

Tip 2: Use your hands to group into tens!

Tip 3: Always check your answers!

Important: Every number can be broken into tens and ones.

Remember: 10 ones = 1 ten.

Worksheets: Pages 1-3

1 Tens and Ones Identification

Worksheet 1: Tens and Ones Identification

Fill in the missing information for each number:
23 = ___ tens + ___ ones
45 = ___ tens + ___ ones
18 = ___ tens + ___ ones

Worksheet Objective:

Identification: Recognizing tens and ones in numbers

How to Complete:

Look at the number (23)
Count how many tens (2 tens = 20)
Count how many ones (3 ones = 3)
Write: 23 = 2 tens + 3 ones

23 = tens + ones

45 = tens + ones

18 = tens + ones

Step 1: Analyze first number (23)

23 has 2 tens (20) and 3 ones (3)

Step 2: Analyze second number (45)

45 has 4 tens (40) and 5 ones (5)

Step 3: Analyze third number (18)

18 has 1 ten (10) and 8 ones (8)

Step 4: Check all answers

20+3=23, 40+5=45, 10+8=18 ✓

23=2T+3O, 45=4T+5O, 18=1T+8O

Worksheet Answers:

23 = 2 tens + 3 ones, 45 = 4 tens + 5 ones, 18 = 1 ten + 8 ones

Worksheet Rules:

• Counting: Group by tens first

• Place value: Tens and ones positions

• Verification: Check answers make sense

2 Building Numbers

Worksheet 2: Building Numbers

Write the number that is made by:
3 tens + 4 ones = ___
2 tens + 7 ones = ___
5 tens + 0 ones = ___

Worksheet Objective:

Composition: Building numbers from tens and ones

3 tens (30) + 4 ones (4) =

2 tens (20) + 7 ones (7) =

5 tens (50) + 0 ones (0) =

Step 1: Calculate first combination

3 tens = 30, 4 ones = 4, so 30 + 4 = 34

Step 2: Calculate second combination

2 tens = 20, 7 ones = 7, so 20 + 7 = 27

Step 3: Calculate third combination

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

Step 4: Check all calculations

30+4=34, 20+7=27, 50+0=50 ✓

34, 27, 50

Worksheet Answers:

3 tens + 4 ones = 34, 2 tens + 7 ones = 27, 5 tens + 0 ones = 50

Worksheet Rules:

• Multiplication: Tens × 10

• Addition: Combine tens and ones

• Zero rule: Adding zero doesn't change value

3 Matching Activity

Worksheet 3: Matching Activity

Draw lines to match each number to its tens and ones:
16 → 1 ten + 6 ones
24 → 2 tens + 4 ones
30 → 3 tens + 0 ones

Worksheet Objective:

Matching: Connecting numbers to their place value parts

Number: 16 → Parts: 1 ten + 6 ones

Number: 24 → Parts: 2 tens + 4 ones

Number: 30 → Parts: 3 tens + 0 ones

Step 1: Match first pair

16 connects to 1 ten + 6 ones

Step 2: Match second pair

24 connects to 2 tens + 4 ones

Step 3: Match third pair

30 connects to 3 tens + 0 ones

Step 4: Verify all matches

All connections are correct!

All numbers matched to correct parts!

Worksheet Completion:

Successfully matched all numbers to their tens and ones parts

Worksheet Rules:

• Recognition: Identify place value parts

• Connection: Link numbers to representations

• Verification: Check matches are correct

Worksheets: Pages 4-5

4 Problem Solving

Worksheet 4: Problem Solving

Solve these word problems:
Tom has 2 tens and 5 ones. How many does he have in total?
Sarah has 34 marbles. How many tens and ones does she have?
If I have 4 tens, how many ones do I need to make 47?

Worksheet Objective:

Application: Using tens and ones in real problems

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

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

Sarah's Problem: 34 = ? tens + ? ones

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

Third Problem: 4 tens + ? ones = 47

4 tens = 40, so 47 - 40 = 7 ones needed

Tom: 2 tens + 5 ones =

Sarah: 34 = tens + ones

Need ones to make 47

Step 1: Solve Tom's problem

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

Step 2: Solve Sarah's problem

34 = 3 tens + 4 ones

Step 3: Solve the third problem

4 tens = 40, so 47 - 40 = 7 ones needed

Step 4: Check all solutions

All answers verified and correct!

Tom: 25, Sarah: 3T+4O, Need: 7 ones

Problem Solutions:

Tom has 25 total, Sarah has 3 tens + 4 ones, need 7 ones to make 47

Worksheet Rules:

• Word problems: Identify key information

• Problem solving: Apply place value concepts

• Checking: Verify solutions make sense

5 Review Challenge

Worksheet 5: Review Challenge

Complete the mixed review:
56 = ___ tens + ___ ones
3 tens + 9 ones = ___
What number has 4 tens and 2 ones?
70 = ___ tens + ___ ones

Worksheet Objective:

Mastery: Comprehensive review of all concepts

56 = tens + ones

3 tens + 9 ones =

4 tens + 2 ones =

70 = tens + ones

Step 1: Solve first problem

56 = 5 tens + 6 ones

Step 2: Solve second problem

3 tens + 9 ones = 30 + 9 = 39

Step 3: Solve third problem

4 tens + 2 ones = 40 + 2 = 42

Step 4: Solve fourth problem

70 = 7 tens + 0 ones

Step 5: Check all answers

50+6=56, 30+9=39, 40+2=42, 70+0=70 ✓

56=5T+6O, 39, 42, 70=7T+0O

Challenge Complete:

Successfully completed all place value problems

Worksheet Rules:

• Review: Apply all learned concepts

• Flexibility: Switch between operations

• Mastery: Demonstrate complete understanding

Worksheets on Understanding Tens and Ones in Grade 1

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