Flashcard decks

Approximately 5000 vocabulary words that should be memorized before taking the SAT. This lesson is broken into 26 parts.

Thirty‐six facts have at least one factor that is either 0 or 1. These facts, though apparently easy, tend to get confused with “rules” that some children learned for addition. Above all else, avoid rules that sound arbitrary and without reason such as “Any number multiplied by zero is zero”.