AP Periodic Table & Equation Sheet
The video to the left gives a nice summary of the decimal-shift method. Here's the handout from class (answers!), another video that uses factor-label and some virtual practice to check your understanding. Section 1.4 in the text. Some digital practice, too!
Here's the handout for significant figures and sig figs in calculations (key). The video to the left gives a nice summary and examples. Here's a playlist from Tyler Dewitt with everything you need to know. Here's some virtual practice to check your understanding. One More digital practice Section 1.5 in the text.