Question

How do you find the value of 325 x 10^-2?

Answer 1

It is `3.25`

Explanation:

If you have to calculate the value of an expression `a*10^n` for an integer value of `n`, the easiest way is to write the value of `a` as a decimal fraction (adding `.0` if `a` is integer) and next move the decimal point `|a|` places tpo the left if `a<0` or to the right if `a>0`

In this case you have:

`a=325`, `n=-2`, so:

1) You write `a` as a decimal fraction `325.0`
2) `n<0`, so you move the decimal point 2 places left, so you get `3.250`
3) Finally you can cross out any zeros at the right end of the number to get `3.25`