Question

Estimate the following products using general rule round of (a)578×161​

Answer 1

Answer:

578x161= 420000

Step-by-step explanation:

578 -------100------> 600

161---------100-------> 700

600x700= 420000

HOW TO ESTIMATE

There is a target which we want to round off to. There are general rule and by 10,100,1000 etc

If it is general rule our target is the ten crores,crores,ten lakhs, lakhs, ten thousands, thousands, hundreds and tens.

It can be more than ten crore

eg:- 12678 so here we will estimate ten lakhs like wise in 4580 thousands, 78099 ten thousands, 67 tens etc

for 10 we will only round 10= 90090 here we will target 9 at 10s place like wise 56490- 9, 80908- 0 in tens

then when we get the target we see to its right digit. There are two groups 1 st group( 0,1,2,3,4) 2nd group( 5,6,7,8,9).

So if it is 1st group, in the target we add 0 and if it is 2nd group we add to the target 1 and target digit and the nearest right digit except these both the digits in the right we will put 0 and in left same number.

For your more understanding u can watch this video

Math Antics rounding

As I am not able to give u the link

HOPE IT HELPS U

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