Really good effort and kindness for sharing tips on how to properly use a powerful calculator. As compared to those trying hard to 'BS" talk day and night about P-o-l-i-t-i-c-s to bait for AD-$. Imagine if NASA have this Casio 991, that is less than 50 bucks was able to do more during the early years 60s - 70s Apollo Space program.
Thank you for your quick tutorial! really helpful
Thank you for the video it was very helpful .
For the solar charging one, can I use both battery and solar? If I use battery only, do I still need to charge it?
The battery cannot be charged. If the battery runs out of power and the light intensity is high enough then the calculator still working.
@@M4U_CLLIEW Ok thank you
Thank you !!!
Really good effort and kindness for sharing tips on how to properly use a powerful calculator. As compared to those trying hard to 'BS" talk day and night about P-o-l-i-t-i-c-s to bait for AD-$. Imagine if NASA have this Casio 991, that is less than 50 bucks was able to do more during the early years 60s - 70s Apollo Space program.