Page 15 - Math 4

Number System

1.7 Seven-digit numerals

Now, can you tell what number comes after 900000 (Nine hundred
thousand)?
Of course, it is 1000000 (Ten hundred thousand).

Ten hundred thousand = 10 lakh = 1000000
Twenty hundred thousand = 20 lakh = 2000000 and so on.
1000000, 2000000, 3000000, ... 9000000 are 7-digit numerals.

1.8 Eight and Nine-digit numerals

Classwork - Exercise

1. Let's tell and write the missing lakhs.

a) 10 lakh, 20 lakh, , , 60 lakh
b) 70 lakh, , 90 lakh, then

Of course, after 90 lakh (9000000) it comes 100 lakh (10000000).
One hundred lakh = 1 crore ⇒ 10000000

Two hundred lakh = 2 crore ⇒ 20000000 and so on.

10000000, 20000000, ... 90000000 are 8-digit numerals.
2. Let's tell and write the missing crores.

a) 1 crore, 2 crore, , , 5 crore

b) 6 crore, , , 9 crore, then

Of course, after 9 crore (90000000), it comes 10 crore (100000000).

100000000 = ten crore is a 9-digit numeral.

Now, let's write these numerals in place value tables and name them.
a) 254876
L T-th Th H T O Two lakh fifty-four thousand eight

2 5 4 8 7 6 hundred seventy-six.

b) 4791038

T-L L T-th Th H T O Forty-seven lakh ninety-one thousand
4 7 9 1 0 3 8 thirty-eight.

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Approved by Curriculum Development Centre, Sanothimi, Bhaktapur vedanta Excel in Mathematics - Book 4