Question

If 9801 is the square of 99
what will be the square of 9.9?​

Answer 1

Answer:

9.9 square means 9.9 x 9.9

so two decimal places come into play

hence square will be

98.01

we can also think of this like

9.9x9.9 =

99/10*99/10

9801/100

(division by hundred)

98.01

Answer 2

If 9801 is the square of 99.

So, the square of 9.9 will have decimals upto 2 decimal places.

Therefore the square of 9.9 is 98.01 .