Expanded Form Activity Sheets for Second Graders (3-Digit Numbers)

📚 Understanding Expanded Form

Expanded form is a way to write numbers by showing the value of each digit. For a 3-digit number, you break it down into hundreds, tens, and ones. For example, the number 345 can be written as 300 + 40 + 5. This helps you understand place value and how each digit contributes to the total value of the number.

Let's look at another example: The number 628 is 6 hundreds, 2 tens and 8 ones. In expanded form, this would be written as 600 + 20 + 8. Keep practicing, and you'll become an expert in no time! 😄

🧮 Part A: Vocabulary

• 🏘️ Place Value: The value of a digit based on its position in a number.
• 💯 Hundreds: The digit in the third position from the right, representing groups of one hundred.
• ➕ Expanded Form: Writing a number as the sum of the values of its digits.
• 🔟 Tens: The digit in the second position from the right, representing groups of ten.
• 1️⃣ Ones: The digit in the rightmost position, representing individual units.

Match each term with its definition:

✍️ Part B: Fill in the Blanks

Complete the sentences using the words from the vocabulary list. In expanded form, a 3-digit number is broken down into ______, tens, and ones. The ______ of a digit tells you its value in the number. Writing 456 as 400 + 50 + 6 is an example of __________. The digit in the _________ place tells us how many single units there are. Finally, the digit in the _________ place tells us how many groups of one hundred there are.

🤔 Part C: Critical Thinking

Imagine you have 5 hundreds, 2 tens, and 7 ones. What number do you have in standard form? Explain how you figured it out.