Page 16 - Maths Skill - 3

14 Maths

Introduction to 4-digit Numbers
We know that the largest 3-digit number is 999 but what happens if we add 1 to it?

+ + + =

900 + 90 + 9 + 1 = 1000

� We write 1000 in words as one thousand. 999 + 1 = 1000

� 1000 is the smallest 4-digit number.
� In the place value chart, the fourth place from the right is called the thousands place.
Thousands Hundreds Tens Ones

1 0 0 0

Forming 4-digit Numbers

Let us learn how to form 4-digit numbers.
Look at the following examples:

(a) + + +

2 thousands + 4 hundreds + 7 tens + 9 ones
2000 + 400 + 70 + 9

This can be written as Th H T O
2 4 7 9

Number name for 2479 is ‘Two thousand four hundred seventy-nine’.

(b) + + +

3 thousands + 1 hundred + 1 ten + 6 ones
3000 + 100 + 10 + 6

This can be written as Th H T O
3 1 1 6

Number name for 3116 is ‘Three thousand one hundred sixteen’.