Adding Or Subtracting Numbers In Scientific Notation

To add or subtract two numbers in scientific notation:

Step 1: Adjust the powers of 10 in the 2 numbers so that they have the same index. (Tip: It is easier to adjust the smaller index to equal the larger index).

Step 2 : Add or subtract the numbers.

Step 3 : Give the answer in scientific notation.

Example :

Evaluate 2 × 10³ + 3.6 × 10⁴, giving your answer in scientific notation.

Solution:

Example :

Evaluate 7 × 10⁵ – 5.2 × 10⁴, giving your answer in scientific notation.

Solution:

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