Sunday 13 October 2013

COMPARISON OF WHOLE USING NUMBER LINE

See a number line.....

Observe on this number line, what is the distance between the points 4 and 6?
It is 2 units, also 6 lies on the right of 4.

 Can you tell the distance between 2 and 7?

It is 5 units, also observe on the number line 7 lies on the right of 2.
So, 6 > 4 and 7 > 2.

So, if we want to compare two whole numbers on a number line we can say that the number which lies on the right is greater. As seen in the above examples 6 lies on the right of 4 so 6 is greater and as 7 lies on the right of 2 so 7 is greater.

Similarly for the same examples we can say that 4 lies on the left of 6 so, 4 is less than 6.

If suppose three whole numbers are to be compared using a number line say 32, 12, 21 then first mark these numbers on the number line.

Which number can you say will be at the farthest right? We can see that 21 lie on the right of 12, and 32 on the right of 21.

So, 32 > 21 > 12.
So, now if you are given two large whole numbers say, 1053 and 2356, which number will lie on the right?

As 2356 > 1053, hence 2356 lies on the right.

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