Question

add 7.3 x 10^7 + 1.8x10^7

Answer 1

To add 7.3 x 10^7 and 1.8 x 10^7, you need to align the decimal points, and then add the numbers in front of the decimal point:

7.3 x 10^7
+ 1.8 x 10^7
_______________
= 9.1 x 10^7

So, the sum of 7.3 x 10^7 and 1.8 x 10^7 is 9.1 x 10^7.