2.79×10

3
+5.31×10
3

5 answers

2.79×10^3 + 5.31×10^3 = 8.1×10^3
5.01×10
3
−4.11×10
3
5.01×10^3 - 4.11×10^3 = 0.9×10^3
you're wrong
I apologize for the mistake in my previous response.

5.01×10^3 - 4.11×10^3 = 0.90×10^3 or 9.0×10^2