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Fractions

    Why LCM?

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6th class > Fractions > Why LCM?

Why LCM?

Take the product of 6 and 15 is which is 90.

Obviously 90 is also a common multiple of 6 and 15. We may use either 90 or (LCM of 6 and 15) and get the correct answer. But we are also aware that it is easier and more convenient to work with smaller numbers. Thus, the common multiple that we take is as small as possible. This is why the LCM of the denominators of the fractions is preferred as the common denominator.

1.Write shaded portion as fraction.

Let's solve the below questions.

1.Find the fractions for below Questions.

Solve the more examples below.

2.Find answers to the following. Write and indicate how you solved them.

3.Ila read 25 pages of a book containing 100 pages. Lalita read25of the same book. Who read less?

Given: The total number of pages in the book = pages.
Number of pages Ila reads = pages.
Number of pages Lalita reads = 25 x = 2 x = pages.
Hence, Ila read number of pages than Lalita.