Place value: The value of a digit based on its position in a number (ones, tens, hundreds)
- Identify the hundreds place
- Identify the tens place
- Identify the ones place
- Use blocks to represent each place
Game Board: Build 247 using place value blocks
2 is in the hundreds place → 2 hundreds = 200
4 is in the tens place → 4 tens = 40
7 is in the ones place → 7 ones = 7
247 has 2 hundreds, 4 tens, and 7 ones. In expanded form: 200 + 40 + 7 = 247
• Position rule: Each digit has a specific place value
• Value rule: Hundreds place is worth 100, tens worth 10, ones worth 1
• Sum rule: Add all place values to get the total number
Expanded form: Writing a number to show the value of each digit (e.g., 156 = 100 + 50 + 6)
Match the numbers to their expanded forms:
1 hundred + 5 tens + 6 ones = 100 + 50 + 6
3 hundreds + 2 tens + 8 ones = 300 + 20 + 8
4 hundreds + 0 tens + 5 ones = 400 + 0 + 5
156 = 100 + 50 + 6
328 = 300 + 20 + 8
405 = 400 + 0 + 5
• Place rule: Each digit represents its place value
• Zero rule: Zero tens still counts as a place
• Sum rule: Adding expanded parts equals original number
Number words: Writing numbers using letters instead of digits
Convert number words to digits:
"Three hundred" = 300
"Forty" = 40
"Two" = 2
300 + 40 + 2 = 342
"Three hundred forty-two" written in digits is 342.
• Word breakdown: Identify hundreds, tens, and ones from words
• Place value: Write digits in correct positions
• Verification: Check that your number matches the word description
Place value: The value of a digit based on its position in a number
Expanded form: Writing a number to show the value of each digit
Standard form: Writing a number using digits (normal way)
- Identify positions: Locate hundreds, tens, and ones places
- Assign values: Multiply each digit by its place value
- Combine: Add all values together
- Verify: Check your answer matches the original number
Self-Assessment Checklist: Use this to check your work
• Hundreds place value: multiply by 100
• Tens place value: multiply by 10
• Ones place value: multiply by 1
• Expanded form: sum of all place values
- Start with visual representations using blocks
- Practice with smaller numbers first
- Gradually increase to larger numbers
- Use the expanded form to check your work