1. Numbers
The numbers we use for counting objects are called counting numbers.These numbers have names like one,two,three,and so on. In English,they are written using numberls such as 1,2,3, -----These numberls are known as International numberls.The numberls in the Devanagari script are 1,2,3,and so on.
Numbers greater then ten lakh : reading and writing
- In the previous standard, we learnt how to write numbers
- upto the lakhs place.
- The smallest six-digit number is 1,00,000 and 9,99,999 (nine lakh ninety-nine thousand nine hundred and ninety-nine) is the largest.
- Whenwe add I to this number,we get the next number, which is 10,00,000 or ten lakh. Ten lakh is also called a million.
- Ten lakh is the smallest seven-digit number and 99,99,999 (ninety-nine lakh ninety-nine thousand nine hundred and ninety-nine) is the largest seven-digit number.
- When we add I to it, we get the eight-digit number 1,00,00,000.
C TL L TTH TH H T U
1 0 0 0 0 0 0 0
In this number, the place to the left of ten lakhs is called ‘crores’.One crore is the smallest eight-digit number.
The place to the left of the crores place is that of ten crores. Thus, one ten-crores and 5 crore, that is, 15 crore is written as 15,00,00,000.
Now, let us take the example of 42,35,78,959. The group of TC (ten crores) and C is together read as forty-two crore;
the group of TL and L is read as thirty-five lakh; the group of TTH and TH is read as seventy-eight thousand and the group of H, T and U is read as nine hundred and fifty-nine.
Hence, the number is read and written in words as ‘ forty-two crore,thirty-five lakh seventy-eight thousand nine hundred and fifty-nine’.
If we add I to 99,99,99,999; that is ,to the largest nine-digit number, we get the next number 1000000000 which is the smallest ten-digit number. It is read as one hundred crore. It is also called a billion.
