Place Value: The value of a digit based on its position in a number.
- Identify the position of each digit
- Match the position to its place value name
- Calculate the value of each digit
- Express the total value
In 4,729, the digit in the thousands place is 4
Value: 4 × 1,000 = 4,000
In 4,729, the digit in the hundreds place is 7
Value: 7 × 100 = 700
In 4,729, the digit in the tens place is 2
Value: 2 × 10 = 20
In 4,729, the digit in the ones place is 9
Value: 9 × 1 = 9
4 = 4,000, 7 = 700, 2 = 20, 9 = 9
• Position Value: Each position represents a power of 10
• Thousand Place: 1,000 × digit value
• Expanded Form: Add the value of each digit
Expanded Form: Writing a number as the sum of each digit multiplied by its place value.
6 is in thousands place = 6,000
3 is in hundreds place = 300
8 is in tens place = 80
4 is in ones place = 4
6,000 + 300 + 80 + 4
6,000 + 300 + 80 + 4 = 6,384 ✓
6,000 + 300 + 80 + 4
• Place Value Multiplication: Each digit × its place value
• Summation: Add all place values together
• Verification: Check that the sum equals the original number
Word Form: Writing a number using words instead of digits.
8 in thousands place = eight thousand
0 in hundreds place = no hundreds (skip this part)
5 in tens place and 2 in ones place = fifty-two
Eight thousand fifty-two
Eight thousand fifty-two
• Zero Handling: Skip zeros in hundreds or tens places
• Compound Numbers: Use hyphens for 21-99 (twenty-one, thirty-five)
• Thousand Grouping: Say thousands part first, then the rest
Place Value: The value of a digit based on its position in a number
Thousands Place: The fourth digit from the right, representing 1,000s
Hundreds Place: The third digit from the right, representing 100s
Tens Place: The second digit from the right, representing 10s
Ones Place: The first digit from the right, representing 1s
Standard Form: Writing numbers using digits (e.g., 4,729)
Expanded Form: Writing numbers as the sum of each place value (e.g., 4,000 + 700 + 20 + 9)
Word Form: Writing numbers using words (e.g., four thousand seven hundred twenty-nine)
- Position Identification: Find the position of each digit
- Value Assignment: Assign the correct place value to each digit
- Calculation: Multiply each digit by its place value
- Conversion: Change between different number forms
- Verification: Check that all forms represent the same number
• Position Matters: Each position has a specific value (1,000s, 100s, 10s, 1s)
• Multiplication Rule: Digit × Place Value = Actual Value
• Zero Rule: Zeros hold place values but contribute no value
• Consistency Rule: All forms must represent the same number
• Verification Rule: Always check your work
Number Construction: Building a number from its place value components.
7 thousands = 7,000
0 hundreds = 0
3 tens = 30
9 ones = 9
Thousands: 7
Hundreds: 0
Tens: 3
Ones: 9
7,039
7,000 + 0 + 30 + 9 = 7,039 ✓
The number is 7,039.
• Component Assembly: Put together each place value component
• Zero Handling: Include zeros in their correct positions
• Verification: Check that the constructed number matches all components
Place Value Relationships: Comparing the actual values of different digits in a number.
9 is in thousands place = 9 × 1,000 = 9,000
6 is in ones place = 6 × 1 = 6
How many times greater is 9,000 than 6?
9,000 ÷ 6 = 1,500
The 9 in the thousands place is 1,500 times greater than the 6 in the ones place
The 9 is 1,500 times greater than the 6.
• Actual Value: Compare the actual values, not just the digits
• Division: Use division to find "how many times greater"
• Place Value Impact: Understand how position affects value
Place Value: The value of a digit based on its position in a number
Digit: Any of the ten symbols 0, 1, 2, 3, 4, 5, 6, 7, 8, or 9
Number: A mathematical object used to count, measure, and label
Standard Form: Writing numbers using digits (e.g., 4,729)
Expanded Form: Writing numbers as the sum of each place value (e.g., 4,000 + 700 + 20 + 9)
Word Form: Writing numbers using words (e.g., four thousand seven hundred twenty-nine)
Base-10 System: Our number system based on powers of 10
Position: The location of a digit in a number
- Digit Identification: Locate each digit in the number
- Position Determination: Identify the place value of each digit
- Value Calculation: Multiply each digit by its place value
- Form Conversion: Change between standard, expanded, and word forms
- Relationship Analysis: Compare place values within the number
- Verification: Check that all forms represent the same value
• Position Value: Each position represents a power of 10
• Base-10 Multiplication: Each position is 10 times the previous
• Zero Holding: Zeros maintain position but add no value
• Form Consistency: All forms represent the same numerical value
• Verification Rule: Always check that conversions are accurate