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Here's the information from the image, formatted in markdown: # Adding and Subtracting in Scientific Notation. - **Key Rule:** Exponents must be the same before adding or subtracting. ## When exponents are the same. * When exponents are the same in an addition or subtraction add or subtract...

Here's the information from the image, formatted in markdown: # Adding and Subtracting in Scientific Notation. - **Key Rule:** Exponents must be the same before adding or subtracting. ## When exponents are the same. * When exponents are the same in an addition or subtraction add or subtract as normal. * **Examples:** * $(3.2 \times 10^5) + (4.1 \times 10^5)$ 1. Add coefficients. $3.2 + 4.1 = 7.3$ 2. Write answer $7.3 \times 10^5$ ## When exponents are different. * When the exponents are different in an addition or subtraction equation you must convert them so they are equal. * **Examples:** * $(5.6 \times 10^6) + (3.2 \times 10^5)$ 1. Convert the numbers $3.2 \times 10^5 =.32 \times 10^6$ 2. Now add the coefficients $5.6 +.32 = 5.92$ 3. Write answer $5.92 \times 10^6$