Скачать или смотреть LATEST NCERT CLASS 7 MATHS GANITA PRAKASH CHAPTER 8C WORKING WITH FRACTIONS PAGES 177,178,179,180

LATEST NCERT CLASS 7 MATHS GANITA PRAKASH CHAPTER 8C WORKING WITH FRACTIONS PAGES 177,178,179,180

MULTIPLYING TWO FRACTIONS

We know, that Aaron’s pet tortoise can walk only 1/4 km in 1 hour. How far can it walk in half an hour?

Finding the product:
Distance covered in 1 hour = 1/4 km.
Therefore, the distance covered in 1/2 an hour is the length we get by
dividing 1/4 into 2 equal parts.
To find this, it is useful to represent fractions using the unit square to stand for a “whole”.

Now we divide this 1/4 into 2 equal parts. What do we get?

What fraction of the whole is shaded?

If the tortoise walks faster and it can cover 2/5 km in 1 hour, how far will
it walk in 3/4 of an hour?

DISCUSSION

CONNECTION BETWEEN THE AREA OF A RECTANGLE AND FRACTION MULTIPLICATION

what is the length and breadth of the shaded rectangle?
Since we started with a unit square (of side 1 unit), the length and breadth are 1/2 unit and 1/4 unit.

What is the area of this rectangle?

Do you see any relation between the area and the product of length and breadth?