Maddie made 3.2×10^5 cookies in her kitchen. After she finished baking, Nicole ate 2.5×10^2 cookies. How many cookies does Maddie have left?

The first step in this equation is to turn the scientific notation into numbers again, so 1.2×10^5 becomes 320,000 and 2.5×10^3 becomes 250. Then you subtract 320,000 by 250 which is 319,750. The last step it to turn it into scientific notation so 3.1975×10^5. Maddie has 3.1975×10^5 cookies left.