Subtraction:

In sequence to subtract two numbers in scientific notation, the steps listed below must be followed.

Step 1: As in addition, change all addends to have the similar power of ten.

Step 2: Subtract one digit from the other and remain the power of ten.

Step 3: If essential, rewrite the decimal along with a single number to the left of the decimal point.

Example:  Subtract (3.27 x 10⁴) - (2 x 10³)

Solution:

Step 1:  3.27 x 10⁴ = 3.27 x 10⁴

2.00 x 10³ = 0.20 x 10⁴

Step 2:  3.27 x 10⁴

-0.20 x 10⁴

Step 3: 3.07 x 10⁴