Place value models – tens and ones
Keynotes :
Introduction to Place Value
- Place Value: Understanding that the position of a digit in a number determines its value.
- Tens and Ones: The basic units for understanding place value at this level.
Concepts
- Digits and Numbers:
- A digit is a single numerical symbol (0-9).
- A number is composed of one or more digits.
- Place Value of Ones:
- Ones place: The rightmost digit in a number.
- Each digit in the ones place represents a single unit (e.g., in 5, the digit 5 represents five ones).
- Place Value of Tens:
- Tens place: The second digit from the right.
- Each digit in the tens place represents ten units (e.g., in 53, the digit 5 in the tens place represents fifty).
Examples
Number 14:
- Tens place: 1 (represents 10)
- Ones place: 4 (represents 4)
- Visual Representation: One ten rod and four unit cubes.
Number 32:
- Tens place: 3 (represents 30)
- Ones place: 2 (represents 2)
- Visual Representation: Three ten rods and two unit cubes.
Learn with an example
📡 Which place-value model shows 29?
- Find the model that shows 29.
- This model has 2 tens and 8 ones. It shows 28.
- This model has 2 tens and 9 ones. It shows 29.
📡 What number is shown?
- Count the tens. There are 5 tens.
- Count the ones. There are 6 ones.
Now write the number. Use a place value chart.
tens ones
5 6
The number is 56.
📡 What number is shown?
- Count the tens. There are 5 tens.
- Count the ones. There are 3 ones.
Now write the number. Use a place value chart.
tens ones
5 3
The number is 53.
Let’s practice!
