Question

9.09 gives 9.1 approximately.How??
pls answer fast

Answer 1

According to estimation the digit increases to 1 if the previous (right) digit is between 5 to 9.

And remains same if the previous (right) digit is between 1 to 4.

Therefore here 9.09 is estimated to 9.1

Answer 2

it is simple because when we round off 9.09 then result came is 9.1

reason is because uncertain digit 9 is greater than 5 so when we round off it then it will became 10so the result came is 9.1