Add times

The same key works for hours, minutes and seconds. Type 3, press , type 30, press , type 45, and press . Type 6, press , type 45, press , type 36, and press : $\displaystyle 3\,\text{h}\,30\,\text{min}\,45\,\text{s} + 6\,\text{h}\,45\,\text{min}\,36\,\text{s}$ is 10°16'21", that is $\displaystyle 10\,\text{h}\,16\,\text{min}\,21\,\text{s}$.

▶ Watch this step in the video (45:06)