Question

A boy band has released two albums. Their first album sold 5.9×10^5 copies. Their second album sold 1.3×10^6 copies. How many total copies has this boy band sold?

Answer 1

The band has sold 1,890,000 copies or 1.89 x 10^6

Answer 2

The boy band sold 1.89 ×10^6 copies

Explanation:

To get the number of copies we must add 5.9×10^5 copies with 1.3×10^6 copies. We can´t add them like that.

To make the addition we have to adjust the power of 10, so they have the same index

In this case we can change 5.9×10^5 to 0.59×10^6 ( we move the comma to the left , and we add 1 power to the scientific quotation.

So, 0.59×10^6

+ 1.3×10^6

1.89 ×10^6