8,41 x 10^3 + 9,71 x 10^4

0,841 x 10^4 + 9,71 x 10^4 = 10,551 x 10 ^4

8,2 x 10^2 + 4 x 10^3

8,2 x 10^2 + 40 x 10^2 =48,2 x 10^2 = 4,82 x 10^3

3 x 10^5 x 3 x 10^6=

3x3=9

^5 + ^6 = ^11 = 9 x 10 ^11

4 x 10 ^-6 x 4 x 10 ^-4=

4x4=16

^-6 + (^-4) =^-10 = 16 x 10 ^-10