How do you write 0.000631 in scientific notation?

Answer 1

1. Write the number starting with the first non-zero digit, putting the decimal point after the first (non-zero) digit (dropping any trailing zeros) followed by times 10.
2. Count how many digits to move the decimal point to get it back to its original position - if to the left make the count negative.
3. Put this count as the power of the 10.

That's How to do it, this is 0.000631 beingdone:

1. 0.000631 → 6.31 x 10
2. decimal point needs to move 4 places to the left to get it back to where it was, so power of 10 is -4
3. 0.000631 = 6.31 x 10-4