[size=150]Number values are sometimes rewritten or corrected to reduce its original degree of accuracy [br]to simplify the numbers to the readers or to allow easier estimation without calculators.[br]Have you understood the concept of significant figures?[br][br]In this self practice, you choose your own numbers and [br]select the significant figure from the given drop down lists (grey).[br][br]Think what the answer should be and [br]input using the virtual keyboard buttons.[br][br]Practice as much as you can to be sure you understood this concept of significant figures.[/size]