Find (4.54 x 108) - (3.98 x 108). When you regroup the decimals, what do you notice about their difference? How does this affect the exponent of the difference? The difference (4.54 x 108) - (3.98 x 108) is equal to The decimal difference is so the exponent of 10 will in the answer. (Use scientific notation. Use the multiplication symbol in the math palette as needed.)