Question

ADDING AND SUBTRACTING IN SCIENTIFIC NOTATION

Find the sum or difference. Write your answer in scientific notation.

(7.2 $\times$10^-6) + (5.44 $\times$ 10^-6)

Answer 1

Step 1. To solve the given expression, first apply distributive property over multiplication.

(7.2 $\times$10^-6) + (5.44 $\times$ 10^-6)

10^-6$\times$( 7.2 + 5.44 )

Step 2. Now adding the digits in bracket

10^-6$\times$( 12.64 )

Step 3. Writing the result in scientific notation

1.264$\times$10^-5