Try to use scientific notation when writing your answers for the Chemistry Advanced Placement exam. For example, instead of writing 1,345,255, write 1.345255 x 106. Remember always to write one digit, a decimal point, the rest of the digits (making sure to use only the correct number of significant figures), and then times 10 to the proper power. An answer such as 0.000045 should be written 4.5 x 10-5 (2 s.f.). Also, don't forget that when you multiply exponents you add them and when you divide exponents you subtract them. Your chemistry textbook or math book probably has a section that covers significant figures, logs, antilogs, scientific notation, and the like. If your math background or algebra skills are weak, you must thoroughly review and polish these skills before you can fully prepare for the Chemistry AP exam.