PPT: We the Travellers—I | Mathematics for Class 5 PDF Download

 Page 1


We the 
Travellers - I
Page 2


We the 
Travellers - I
I n tr oduction
Numbers are everywhere 3 in travel, money, and 
population.
For example, Distances covered in 1 hour:
Walking ³ 335 km
Cycle ³ 12320 km
Train ³ 403160 km
Aircraft ³ 7503920 km
Spacecraft ³ 28,000 km or more
These numbers can be small (1-digit) or very large (5-
digit).
Page 3


We the 
Travellers - I
I n tr oduction
Numbers are everywhere 3 in travel, money, and 
population.
For example, Distances covered in 1 hour:
Walking ³ 335 km
Cycle ³ 12320 km
Train ³ 403160 km
Aircraft ³ 7503920 km
Spacecraft ³ 28,000 km or more
These numbers can be small (1-digit) or very large (5-
digit).
Reading and Writing Large Numbers
How do we write numbers to show several thousand objects?
Let's start with 1,000. What numbers do we get when we keep adding a thousand?
1,000 + 1,000 = 2,000
2,000 + 1,000 = 3,000
And so on until...
9,000 + 1,000 = 10,000 (ten thousand)
Page 4


We the 
Travellers - I
I n tr oduction
Numbers are everywhere 3 in travel, money, and 
population.
For example, Distances covered in 1 hour:
Walking ³ 335 km
Cycle ³ 12320 km
Train ³ 403160 km
Aircraft ³ 7503920 km
Spacecraft ³ 28,000 km or more
These numbers can be small (1-digit) or very large (5-
digit).
Reading and Writing Large Numbers
How do we write numbers to show several thousand objects?
Let's start with 1,000. What numbers do we get when we keep adding a thousand?
1,000 + 1,000 = 2,000
2,000 + 1,000 = 3,000
And so on until...
9,000 + 1,000 = 10,000 (ten thousand)
Page 5


We the 
Travellers - I
I n tr oduction
Numbers are everywhere 3 in travel, money, and 
population.
For example, Distances covered in 1 hour:
Walking ³ 335 km
Cycle ³ 12320 km
Train ³ 403160 km
Aircraft ³ 7503920 km
Spacecraft ³ 28,000 km or more
These numbers can be small (1-digit) or very large (5-
digit).
Reading and Writing Large Numbers
How do we write numbers to show several thousand objects?
Let's start with 1,000. What numbers do we get when we keep adding a thousand?
1,000 + 1,000 = 2,000
2,000 + 1,000 = 3,000
And so on until...
9,000 + 1,000 = 10,000 (ten thousand)
Place Value 
Every digit has a place and a value.
Example: 45,867
4 = 40,000 (Ten-
thousands)
5 = 5,000 
(Thousands)
8 = 800 (Hundreds)
6 = 60 (Tens)
7 = 7 (Ones)
Number = 40,000 + 
5,000 + 800 + 60 + 7
Expanded Form  = (4 × 
10,000)+(5 × 1,000)+(8 × 
100)+(6 × 10)+(7 × 1)
Number Name = Forty-five 
thousand eight hundred 
sixty-seven