PPT: Sharing and Measuring | Mathematics Olympiad Class 4 PDF Download

 Page 1


Sharing and 
Measuring
Page 2


Sharing and 
Measuring
Introduction
Sharing Equally
Sharing things like chocolate or pizza involves dividing them equally.
Using Fractions
When we share equally, we use f r a c t i o n s.
Real Example
Ex a m p l e: Ikra and Samina share a drawing sheet.
- Ikra suggests dividing it into half (1/2) or two quarters (2/4).
- Samina chooses two quarters, thinking it's bigger, but 2/4 equals 1/2.
Purpose of Fractions
Fractions help us divide things into equal parts.
Page 3


Sharing and 
Measuring
Introduction
Sharing Equally
Sharing things like chocolate or pizza involves dividing them equally.
Using Fractions
When we share equally, we use f r a c t i o n s.
Real Example
Ex a m p l e: Ikra and Samina share a drawing sheet.
- Ikra suggests dividing it into half (1/2) or two quarters (2/4).
- Samina chooses two quarters, thinking it's bigger, but 2/4 equals 1/2.
Purpose of Fractions
Fractions help us divide things into equal parts.
Parts and Wholes
What is a Fraction?
A f r a c t io n shows a part of a whole.
The whole is divided into equal parts.
E x a m p le: A sheet divided into 2 equal parts = 2 halves (each 
1/2).
Fractions are written as numbers like 1/2 or 1/4.
Equivalent Fractions
Samina's two quarters (2/4) make one half (1/2) because 2/4 = 
1/2.
Page 4


Sharing and 
Measuring
Introduction
Sharing Equally
Sharing things like chocolate or pizza involves dividing them equally.
Using Fractions
When we share equally, we use f r a c t i o n s.
Real Example
Ex a m p l e: Ikra and Samina share a drawing sheet.
- Ikra suggests dividing it into half (1/2) or two quarters (2/4).
- Samina chooses two quarters, thinking it's bigger, but 2/4 equals 1/2.
Purpose of Fractions
Fractions help us divide things into equal parts.
Parts and Wholes
What is a Fraction?
A f r a c t io n shows a part of a whole.
The whole is divided into equal parts.
E x a m p le: A sheet divided into 2 equal parts = 2 halves (each 
1/2).
Fractions are written as numbers like 1/2 or 1/4.
Equivalent Fractions
Samina's two quarters (2/4) make one half (1/2) because 2/4 = 
1/2.
Understanding Halves
Definition
H a l f: When a whole is divided into 2 equal parts.
Written as 1/ 2.
Example
A chocolate bar split into 2 equal parts.
Each part is 1/2 of the bar.
Requirements
For correct halves:
- Both parts must be equal in size and shape.
- Folding one part over the other should match perfectly.
Page 5


Sharing and 
Measuring
Introduction
Sharing Equally
Sharing things like chocolate or pizza involves dividing them equally.
Using Fractions
When we share equally, we use f r a c t i o n s.
Real Example
Ex a m p l e: Ikra and Samina share a drawing sheet.
- Ikra suggests dividing it into half (1/2) or two quarters (2/4).
- Samina chooses two quarters, thinking it's bigger, but 2/4 equals 1/2.
Purpose of Fractions
Fractions help us divide things into equal parts.
Parts and Wholes
What is a Fraction?
A f r a c t io n shows a part of a whole.
The whole is divided into equal parts.
E x a m p le: A sheet divided into 2 equal parts = 2 halves (each 
1/2).
Fractions are written as numbers like 1/2 or 1/4.
Equivalent Fractions
Samina's two quarters (2/4) make one half (1/2) because 2/4 = 
1/2.
Understanding Halves
Definition
H a l f: When a whole is divided into 2 equal parts.
Written as 1/ 2.
Example
A chocolate bar split into 2 equal parts.
Each part is 1/2 of the bar.
Requirements
For correct halves:
- Both parts must be equal in size and shape.
- Folding one part over the other should match perfectly.
Understanding Quarters
Definition
Q u a r t e r: When a whole is divided into 4 equal parts. 
Written as 1 / 4.
Example
A square divided into 4 equal parts.
Each part is 1/4.
If one part is shaded, it's 1/4 of the whole.
All 4 parts must be equal in size.