Question

Which shows the expression below simplified?

(2.2 x 10^-1) + (2.3 x 10^-2)
Hint: You must have the same power of 10 before you can add.
A) 2.43 x 10^-2
B) 4.5 x 10^-1
C) 4.5 x 10^-2
D) 2.43 x 10^-1

Answer 1

(2.2x10^-1)=22x10^-2
(22x10^-2)+(2.3x10^-2) = 24.3x10^-2
=2.43x10^-1

Therefore, the answer is D