Problem : Compute 3.45×1016 + 9.80×1018.

9.8345×1018

Problem : Compute 6.12×10-2 -4.9×10-4.

6.071×10-2

Problem : Compute 4.0219×104 +6×10-3.

4.0219006×104

Problem : Compute 6.1×102 -4.38×104.

-4.319×104

Problem : Compute 9.9×10-18 +4.2×10-19.

1.032×10-17

Problem : Compute 1.02×1012 - 4.5×1010.

9.75×1011