PPT: Thousands Around Us | Mathematics Olympiad Class 4 PDF Download

 Page 1


Thousands 
Around Us
Page 2


Thousands 
Around Us
Introduction
Big numbers like thousands are all around us!
E x a m p l e: Jaspreet and Gulnaz organize a langar at their 
Gurudwara.
Expect around 1,000 people.
Track people at different times: 52, 145, 325, 508.
We'll learn:
How to read and write thousands.
Place values in the Indian number system.
Comparing and arranging big numbers.
Page 3


Thousands 
Around Us
Introduction
Big numbers like thousands are all around us!
E x a m p l e: Jaspreet and Gulnaz organize a langar at their 
Gurudwara.
Expect around 1,000 people.
Track people at different times: 52, 145, 325, 508.
We'll learn:
How to read and write thousands.
Place values in the Indian number system.
Comparing and arranging big numbers.
Place Value System
Indian number system uses 10 digits: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9.
Numbers are grouped into:
U n i t s: First three digits from right (Ones, T ens, Hundreds).
T h o u s a n d s: Next two digits (Thousands, T en Thousands).
L a k h s: Next two digits (Lakhs, T en Lakhs).
C r o r e s: Digits after lakhs (Crores, T en Crores).
Place value shows how much each digit is worth.
Page 4


Thousands 
Around Us
Introduction
Big numbers like thousands are all around us!
E x a m p l e: Jaspreet and Gulnaz organize a langar at their 
Gurudwara.
Expect around 1,000 people.
Track people at different times: 52, 145, 325, 508.
We'll learn:
How to read and write thousands.
Place values in the Indian number system.
Comparing and arranging big numbers.
Place Value System
Indian number system uses 10 digits: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9.
Numbers are grouped into:
U n i t s: First three digits from right (Ones, T ens, Hundreds).
T h o u s a n d s: Next two digits (Thousands, T en Thousands).
L a k h s: Next two digits (Lakhs, T en Lakhs).
C r o r e s: Digits after lakhs (Crores, T en Crores).
Place value shows how much each digit is worth.
Indian Place Value Chart
Ones 1
T ens 10
Hundreds 100
Thousands 1,000
T en Thousands 10,000
Lakhs 1,00,000
T en Lakhs 10,00,000
Crores 1,00,00,000
T en Crores 10,00,00,000
Page 5


Thousands 
Around Us
Introduction
Big numbers like thousands are all around us!
E x a m p l e: Jaspreet and Gulnaz organize a langar at their 
Gurudwara.
Expect around 1,000 people.
Track people at different times: 52, 145, 325, 508.
We'll learn:
How to read and write thousands.
Place values in the Indian number system.
Comparing and arranging big numbers.
Place Value System
Indian number system uses 10 digits: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9.
Numbers are grouped into:
U n i t s: First three digits from right (Ones, T ens, Hundreds).
T h o u s a n d s: Next two digits (Thousands, T en Thousands).
L a k h s: Next two digits (Lakhs, T en Lakhs).
C r o r e s: Digits after lakhs (Crores, T en Crores).
Place value shows how much each digit is worth.
Indian Place Value Chart
Ones 1
T ens 10
Hundreds 100
Thousands 1,000
T en Thousands 10,000
Lakhs 1,00,000
T en Lakhs 10,00,000
Crores 1,00,00,000
T en Crores 10,00,00,000
Representing Numbers Using 
Blocks (One Thousand)
Dienes Blocks show numbers:
1 small cube = 1 (One).
1 rod = 10 (T en).
1 flat square = 100 (Hundred).
1 large cube = 1,000 (Thousand).
Relationships:
10 Ones = 1 T en.
10 T ens = 1 Hundred.
10 Hundreds = 1 Thousand.