Page 5 - Maths Class 04

1 Large Numbers

Looking Back

When we write big numbers containing 4 digits or more, we use a comma to
separate the thousands from the HTO. The comma tells us that the number
to the left of the comma is in a different house. In Maths, we call this house

a period .

Thousands Ones
Period
Th H T O
(House)
7 0 3 6

Here, we see the number 7036 placed in periods (or houses).

We write the number like this : 7,036

It is correct to use a comma in 4-digit numbers, but sometimes, it is omitted

for the sake of convenience, since a 4-digit number can be read easily.

Practice - 1.1
Practice - 1.1
Practice - 1.1
Practice - 1.1
1. Fill in the missing numbers.

a. 305 309 312

b. 727 732

2. Write the numeral for each of the following.

a. Seven hundred ninety one _______________________

b. Eight hundred six _______________________

c. Five hundred fifty four _______________________

d. Three hundred forty nine _______________________

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