Tamil Nadu Board of Secondary EducationSSLC (English Medium) (5 to 8) Class 6

# An Aid in Reading and Writing Large Numbers

## Notes

### An aid in reading and writing large numbers:

Sometimes it helps to use indicators to read and write large numbers otherwise we face difficulties.

For example, we identify the digits in one's place, ten's place and hundred's place in 257 by writing them under the tables O, T, and H as

 H T O Expansion 2 5 7 2 × 100 + 5 × 10 + 7 × 1

Similarly, for 2902,

 Th H T O Expansion 2 9 0 2 2 × 1000 + 9 × 100 + 0 × 10 + 2 × 1

One can extend this idea to numbers up to lakh as seen in the following table.

 Number TLakh Lakh TTh Th H T O Number Name Expansion 7,34,543 - 7 3 4 5 4 3 Seven lakh thirty-four thousand five hundred forty-three 7 × 1,00,000 + 3 × 10,000 + 4 × 1000 + 5 × 100 + 4 × 10 + 3.

Similarly, we may include numbers up to crore as shown below:

 Number TCr CR TLakh Lakh TTh Th H T O Number Name Expansion 65,32,75,829 6 5 3 2 7 5 8 2 9 Sixty-five crore thirty-two lakh seventy-five thousand eight hundred twenty-nine 6 × 100000000 + 5 × 10000000 + 3 ×1000000 + 2  × 1,00,000 + 7 × 10,000 + 5 × 1000 + 8 × 100 + 2 × 10 + 9.
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