A standard form should be in the form a.bcde ×10n The decimal point must be after the first non-zero digit. The n is the number of times the decimal point has to be moved to be right after the first non-zero digit. If it is moved to the left, the n is positive and if to the right, n is negative. Every number has .0 at the end which is not written 4037=4037.0 4037=4.037.0=4.037×103 Note: We moved three times (3) to the left, hence the power is positive 3.