Operation

problem statement : how do the inside look of scientific calculator fx-570MS?

Aim : clean the dust

Apparatus : screwdriver

Material : calculator

Method :
1. loose all the screw.
2. remove button
3. clean dust
4. rearrange the button
5. record the data

Observation :




conclusion :
0.5g of dust has been cleaned. take a picture before remove all the buttons.
avoid assemble error that might causing next test get 0mark....xd