Friday , August 19 2022

NCERT 5th Class (CBSE) Mathematics: Fractions


Two numbers whose product is 1 are called reciprocals.

For example, 5/6 and 6/5 are reciprocals.

5/6×6/5 = 30/30 = 1


4 and 1/4 are reciprocals.

Reciprocals - 1

Step 1. Write the number as a fraction             7/1, 3/4, 5/2

Step 2. Interchange the numerator and denominator    1/7, 4/3, 2/5


Dividing Fractions

To understand division of fractions let us look at division again.

Division of fractions-1

If you had a sum 6÷2, you could think of it as ‘how many 2s are there in 6?’ The answer would be 3.

Division of fractions-2

There are three 2s in 6.

Dividing a Whole Number by an Unit Fraction

(a) You can do the same thing when you divide by fractions.

To understand 3÷1/2, ask the question ‘how many halves in 3?’

Division of fractions-3

These are three apples. Think: ‘how many halves in three apples?’

Division of fractions-4

We can see that there are 6 halves in 3 apples.

3÷1/2 = 6

Division of fractions-5

We can also describe the same picture as 3×2 = 6

Dividing by 1/2 is just like multiplying by 2.

Here is how you can solve the sum without pictures.

3             ÷             1/2               = ?

Dividend                    Divisor

Step 1. Find the reciprocal of the divisor. Reciprocal of 1/2 is 2/1.

Step 2. Multiply the dividend with the reciprocal: 3×2/1 = 6
3÷1/2 = 6

Check Also

5th class NCERT Hindi Book Rimjhim

चुनौती हिमालय की 5th NCERT CBSE Hindi Rimjhim Ch 18

चुनौती हिमालय की 5th Class NCERT CBSE Hindi Book Rimjhim Chapter 18 प्रश्न: लद्दाख जम्मू-कश्मीर राज्य में …

One comment

  1. I need worksheet for Class 5th Mathematics.