Revisiting place value
You have done this quite earlier, and you will certainly remember the expansion of a 2-digit number like 78 as
78 = 70 + 8 = 7 × 10 + 8
Similarly, you will remember the expansion of a 3-digit number like 278 as
278 = 200 + 70 + 8 = 2 × 100 + 7 × 10 + 8
We say, here, 8 is at
Later on we extended this idea to 4-digit numbers.
For example, the expansion of 5278 is
5278 = 5000 + 200 + 70 + 8 = 5 × 1000 + 2 × 100 + 7 × 10 + 8
Here, 8 is at ones place, 7 is at tens place, 2 is at hundreds place and 5 is at
With the number 10000 known to us, we may extend the idea further. We may write 5-digit numbers like
45278 =
= 4 × 10000 + 5 × 1000 + 2 × 100 + 7 × 10 + 8
We say that here 8 is at ones place, 7 at tens place, 2 at hundreds place, 5 at thousands place and 4 at
The number is read as forty five thousand, two hundred seventy eight.
Can you now write the smallest five digit number?
and now, the greatest 5-digit numbers?
Choose the correct number names for the given number.
Let's further work on the expansion of these numbers
Expand the numbers for the given numbers
20000 = 2 × 10000
26000 = 2 × 10000 + 6 × 1000
38400 =
65740 = 6 ×
89324 =
50000 = 5 ×
41000 =
47300 =
57630 = 5 ×
29485 =
20005 =