Page 10 - Start Up Mathematics_4
P. 10
5-Digit and 6-Digit Numbers
The largest 4-digit number is 9999.
9999 + 1 = 10000 which is the smallest 5-digit number.
Also, 10000 = 10 thousands = 1 ten thousand
The largest 5-digit number is 99999.
99999 + 1 = 100000 which is the smallest 6-digit number.
Also, 100000 = 10 ten thousands = 1 lakh, and so on.
Numbers and Number Names
To write a 5-digit number, we need any five digits from 0 to 9. These digits are written under
TTh (Ten thousands), Th (Thousands), H (Hundreds), T (Tens) and O (Ones).
TTh Th H T O
3 6 8 7 5 = 3 ten thousands + 6 thousands + 8 hundreds + 7 tens + 5 ones
On an abacus, 36875 is shown as:
TTh Th H T O Rod TTh reads in ten thousands.
Rod Th reads in thousands.
Rod H reads in hundreds.
Rod T reads in tens. Remember
Rod O reads in ones. We cannot write 0 at
the thousands place
Similarly, to write a 6-digit number we need six digits, written as it will then become
under L (Lakhs), TTh (Ten thousands), Th (Thousands), a 4-digit number.
H (Hundreds), T (Tens) and O (Ones).
L TTh Th H T O
2 1 9 4 6 3 = 2 lakhs + 1 ten thousand + 9 thousands + 4 hundreds +
6 tens + 3 ones
On an abacus, 219463 is shown as
Rod L reads in lakhs.
L TTh Th H T O
Rod TTh reads in ten thousands.
Rod Th reads in thousands.
Rod H reads in hundreds.
Rod T reads in tens.
Rod O reads in ones.
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