FRACTIONS
When a thing is divided into equal parts each part is called a fraction of the whole(the full thing).
Half
When something is divided into two equal parts ,each part is one half of the whole.
One half is written as 1/2.
To write a fraction in numbers,we write number of parts chosen
total number of equal parts
One Third
When something is divided into three equal parts,each part is one third(1/3)of the whole.
Two one thirds together make two thirds(2/3).
Three one thirds together make the whole.
One Fourth
When something is divided into four equal parts,each part is one fourth(1/4)of the whole.
One fourth is also called a quarter.
To find half of a number ,divide by 2
1/2 of 4=2 1/2 of 8=4 1/2 of 12=6
To find one third of a number , divide by 3
1/3 of 6=3 1/3 of 9=3 1/3 of 12=4
To find one fourth of a number , divide by 4
1/4 of 8=2 1/4 of 12=3 1/4 of 20=5
Fill in
1/2 of 4 = 8 1/2 of 12 = 6 1/3 of of 9= 3 1/5 of 10= 2 1/9 of 18= 2
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One third of 18= 6 A quarter of 16= 4 One sixth of 24= 4
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In 3/4 the numerator is 3 and the denominator is 4.
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In 7/9 the numerator is 7 and the denominator is 9.
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The fraction whose numerator is 4 and denominator is 7 is 4/7.
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The fraction whose numerator is 11 and denominator is 13 is 11/13
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In 3/4 the numerator is 3 and the denominator is 4.
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In 7/9 the numerator is 7 and the denominator is 9.
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The fraction whose numerator is 4 and denominator is 7 is 4/7.
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The fraction whose numerator is 11 and denominator is 13 is 11/13
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1. Nine Children went for a picnic.One third of them were girls,how many boys were there?
A. Total number of children=9
Number of girls = 1/3 of 9
= 1/3 * 9
= 3
So number of boys = 9-3=3
2. Ajay read one fifth of a 100-page book.How many pages of the book did he read?
A. Total number of pages = 100
Number of pages Ajay read = 1/5 of 100
= 1/5 *100
= 20
3. An hour has 60 minutes.How many minutes is aquarter of an hour?
A. 1 hour = 60 minutes
Quarter of an hour=1/4 of an hour=1/4 of 60 minutes
=1/4 *60
=15 minutes
4. Ali shared 1 litre of pineapple juice equally with three friends.How much did each friend get?
A. Amount of pineapple juice = 1 litre / 1000ml
Total number of members = 4(including Ali)
Amount of pineapple juice each friend get=1/4 litre or 1000/4 ml
=1/4 litre or 250 ml
5. Eight children shared a pizza equally.What fraction of the pizza did each child get?
A. Total number of children = 8
Fraction of the pizza each child get=1/8
6. Jyothi had 24 sweets.She gave one third of them to Vijaya.How many sweets were left?
A. Number of sweets = 24
Number of sweets she gave to Vijaya=1/3 of 24
=1/3 *24
=8
Number of sweets left =24-8=16
7. Swathi has watered one fourth of her plants.If she has 16 plants,how many more plants does she have to water?
A. Total number of plants = 16
Number of plats swathi watered=1/4 of 16
=1/4 *16
=4
Number of plants she has to water=16-4=12