Steve Sobek will demonstrate a mental math trick that will enable you to quickly subtract large number in your head without pencil or paper.
The video assumes that you have already mastered your addition tables like 8 + 7 = 15, and can also instantly give an answer for 15 7 = 8. If you can provide answers instantly to those basic types of problems, then you are ready for this mental math trick involving larger numbers.
After learning the trick, practice with online flashcards at www.AmysFlashcards.com