Question

Perform the following operationand express the answer inscientific notation.4.3x10² - 7.0×10² = [?]×10

Answer 1

Explanation:

We have to perform the following substraction:

4.3 x 10² - 7.0 × 10² = ?

Since both numbers have the same order of magnitude we can directly substract them.

4.3 - 7.0 = -2.7

So the answer to our operation is:

4.3 x 10² - 7.0 × 10² = -2.7 × 10²

Answer: -2.7 × 10²