Powers of Ten: Addition and Subtraction
Exponents must be the same of the operation
cannot be performed. If the exponents do not agree, change the decimal and
power of ten notation so as to agree with the larger number.
Add or subtract the number.
Keep the same power of ten.
x 103 = 4.2 x 103
2 x 103 = 0.02 x 103
DO) 4.22 x 103
= 4.2 x 103
scientific notation. Use correct number of significant figures.)
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