which-of-the-following-steps-is-necessary-to-add-23-x-103-and-54-x-104

Question

Which of the following steps is necessary to add ($$2.3 x 10^3) $$and ($$5.4 x 10^4$$)?

Accepted Answer

Convert $$2.3 x 10^3 to$$ $$0.23 x 10^4$$ before adding.

Answer

Subtract their exponents before adding.

Answer

Convert $$5.4 x 10^4 to$$ $$54 x 10^3$$ before adding.

Answer

Add the coefficients directly without adjusting exponents.

Which of the following steps is necessary to add (2.3 x 10^3) and (5.4 x 10^4)?