2
Same digit, different value
Discover Mathematics P2: Term 1, Lessons 21–30
GoalTell the value of a digit by its place in a number.
New words
place · where a digit stands: ones, tens or hundredsvalue · how much a digit is worth in its placeplace value · the worth of a digit because of its place
Explanation
The same digit can be worth different amounts. It depends on its place. In 333 there are three 3s. The 3 on the left is in the hundreds place and is worth 300. The middle 3 is in the tens place and is worth 30. The last 3 is in the ones place and is worth 3.
| Hundreds | Tens | Ones |
|---|---|---|
| 3 | 3 | 3 |
Worked examples
| Hundreds | Tens | Ones |
|---|---|---|
| 3 | 5 | 2 |
| Hundreds | Tens | Ones |
|---|---|---|
| 4 | 3 | 5 |
| Hundreds | Tens | Ones |
|---|---|---|
| 5 | 4 | 3 |
Class activity
Digit cards. Make three cards with the digits 4, 7 and 2. Arrange them to make different numbers and read each one. Point to the 7 each time and say its value, such as 70 or 700.
Practice
1
What is the value of the 7 in 763?
| Hundreds | Tens | Ones |
|---|---|---|
| 7 | 6 | 3 |
700
2
What is the value of the 6 in 763?
| Hundreds | Tens | Ones |
|---|---|---|
| 7 | 6 | 3 |
60
3
What is the value of the 5 in 245?
5
4
In 888, which 8 is worth the most?
The first 8, in the hundreds place (800)
5
Why is the 4 in 140 worth 40 and not 4?
It is in the tens place.