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Expanded Form 3-Digit NumbersFREEWorksheet Generator(Grade 2)

Expanded Form 3-Digit Numbers worksheets (Grade 2) with step-by-step answer keys. Generate unlimited unique practice sheets with fresh problems.

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Set A • 10 Qs

PanMaths.comExpanded Form 3-Digit Numbers Worksheets • Set A (Medium)

Name: __________________________

Date: _____________ Period: ____

Score: _____ / 10

1.Expanded Form

235=

2.Standard Form

100+10+1=

3.Expanded Form

854=

4.Standard Form

600+70+7=

5.Expanded Form

337=

6.Standard Form

800+40+2=

7.Expanded Form

244=

8.Standard Form

400+60+1=

9.Expanded Form

481=

10.Standard Form

700+0+3=

PanMaths.com • Free Math Worksheet Generator • Set A (Medium)Page 1 of 2

PanMaths.comAnswer Key & Worked Solutions • Set A (Medium)

Answer Key

Total Problems: 10

1.Expanded Form

235=

200

Identify place values: 2 hundreds = 200, 3 tens = 30, 5 ones = 5.

2.Standard Form

100+10+1=

111

Combine place values: 100 + 10 + 1 = 111.

3.Expanded Form

854=

800

Identify place values: 8 hundreds = 800, 5 tens = 50, 4 ones = 4.

4.Standard Form

600+70+7=

677

Combine place values: 600 + 70 + 7 = 677.

5.Expanded Form

337=

300

Identify place values: 3 hundreds = 300, 3 tens = 30, 7 ones = 7.

6.Standard Form

800+40+2=

842

Combine place values: 800 + 40 + 2 = 842.

7.Expanded Form

244=

200

Identify place values: 2 hundreds = 200, 4 tens = 40, 4 ones = 4.

8.Standard Form

400+60+1=

461

Combine place values: 400 + 60 + 1 = 461.

9.Expanded Form

481=

400

Identify place values: 4 hundreds = 400, 8 tens = 80, 1 ones = 1.

10.Standard Form

700+0+3=

703

Combine place values: 700 + 0 + 3 = 703.

PanMaths.com • Answer Key & Worked SolutionsPage 2 of 2

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Worksheet Info

Categorygrade-2

Grade LevelGrade 2

DifficultyEasy, Medium, Hard, Sprint

Time5-10 min

CCSS CodeCCSS.MATH.CONTENT.2.NBT.A.3

Skills Practiced

✓ Expanded Form 3-Digit Numbers

Key Strategies

🗣️ Say the Number Slowly Out Loud: Saying 'three hundred forty-eight' reveals the exact expanded parts: 'three hundred' (300) + 'forty' (40) + 'eight' (8)!
📍 Break Down by Value Columns: Hundreds digit gets two zeros (×100), tens digit gets one zero (×10), and ones digit stays by itself (×1).
🛑 Watch Out for Zero in the Tens Place: For 406, there are 0 tens: 400 + 0 + 6 (or 400 + 6). Never write 40!

Related Worksheets

📄 Base-10 Blocks to 1,000View →📄 Comparing 3-Digit NumbersView →📄 Skip Counting by 3s and 4sView →📄 2-Digit Addition Without RegroupingView →📄 2-Digit Addition With RegroupingView →📄 3-Digit Addition With RegroupingView →

📜 Standard: CCSS.MATH.CONTENT.2.NBT.A.3🔗 CCSS.MATH.CONTENT.2.NBT.A.1🔗 CCSS.MATH.CONTENT.2.NBT.B.8

Mastering Expanded Form 3-Digit Numbers: Core Concepts & Mental Models

Expanded form stretches a number out to reveal the true place value of each individual digit. Understanding that 753 is not just '7, 5, 3', but rather 700 + 50 + 3, cements base-ten structure and prevents column alignment errors in multi-digit addition.

Worked Example & SolutionTeacher Step-by-Step Method

📝 Problem: Write 582 in expanded form.

Worked Solution: 1. 5 in hundreds place = 500. 2. 8 in tens place = 80. 3. 2 in ones place = 2. 4. Expanded form: 500 + 80 + 2.

💡 Essential Strategies for Expanded Form 3-Digit Numbers

🗣️ Say the Number Slowly Out Loud

Saying 'three hundred forty-eight' reveals the exact expanded parts: 'three hundred' (300) + 'forty' (40) + 'eight' (8)!

📍 Break Down by Value Columns

Hundreds digit gets two zeros (×100), tens digit gets one zero (×10), and ones digit stays by itself (×1).

🛑 Watch Out for Zero in the Tens Place

For 406, there are 0 tens: 400 + 0 + 6 (or 400 + 6). Never write 40!

⚠️ Common Mistakes & Teacher Fixes

⚠️Writing digits instead of place values (e.g. 348 = 3 + 4 + 8)

Why students stumble: Writing the face value of the digits instead of their true base-ten value.

Teacher Fix: Always remind: 3 + 4 + 8 = 15, not 348! The 3 means 300, and the 4 means 40.

Example: 348 = 300 + 40 + 8, NOT 3 + 4 + 8.

⚠️Misplacing zeros when converting back to standard form

Why students stumble: Reading 400 + 6 and writing 460 instead of 406.

Teacher Fix: Notice that 6 is in the ones place, so the tens place must have a 0: 406.

Example: 400 + 6 = 406, not 460.

📖 Key Mathematical Vocabulary

Expanded Form

A way to write numbers by showing the value of each digit added together (e.g. 348 = 300 + 40 + 8).

Standard Form

The normal way we write numbers using digits (e.g. 348).

Place Value

The numerical worth of a digit based on its column (hundreds, tens, ones).

❓ Frequently Asked Questions

How do you solve a expanded form 3-digit numbers problem step by step?

Here is a worked example: "Write 582 in expanded form.". Solution: 1. 5 in hundreds place = 500. 2. 8 in tens place = 80. 3. 2 in ones place = 2. 4. Expanded form: 500 + 80 + 2.

What is the core learning objective for expanded form 3-digit numbers?

Read and write 3-digit numbers using base-ten numerals, number names, and expanded form (e.g., 348 = 300 + 40 + 8). This directly aligns with Common Core Standard CCSS.MATH.CONTENT.2.NBT.A.3.

What is the most common mistake students make with expanded form 3-digit numbers?

A frequent pitfall is: "Writing digits instead of place values (e.g. 348 = 3 + 4 + 8)". Why students stumble: Writing the face value of the digits instead of their true base-ten value. How to fix it: Always remind: 3 + 4 + 8 = 15, not 348! The 3 means 300, and the 4 means 40. (Example: 348 = 300 + 40 + 8, NOT 3 + 4 + 8.)

How does the unlimited expanded form 3-digit numbers worksheet generator work?

Every click of 'Generate New Worksheet' creates a completely fresh set of expanded form 3-digit numbers problems with unique numbers. No two worksheets are ever the same — perfect for daily practice, homework variety, and preventing student copying. You can also customize the problem count (6, 8, 10, 12, 15, or 20 problems per sheet).

Are these expanded form 3-digit numbers worksheets free to print with answer keys?

Yes! Every single worksheet on PanMaths is 100% free with no sign-up needed. Each sheet includes a dedicated Answer Key on Page 2 with step-by-step intermediate evaluation lines for 1-minute grading.