Move the decimal so there is one non-<u>zero digit</u> to the left of the <u>decimal point</u>. The number of decimal places you move will be the <u>exponent</u> on the 10. If the decimal is being moved to the right, the <u>exponent</u> will be negative. If the decimal is being moved to the left, the <u>exponent </u>will be positive.