R3CK0N

Secrets of Mental Math drills

A chapter-by-chapter guide and timed drills for every lightning-calculation technique in Secrets of Mental Math:

• Left-to-right addition and subtraction
• Multiplying by 11, by 5 and 25, and by 9
• Squaring numbers, including numbers ending in 5
• Two-digit by two-digit multiplication
• Division and square roots
• Memorising numbers, and the day of the week for any date

Play

• Home · Today · Train · Prep · Compete · Arcade
• Math · Secret · Zen · Flashcards · GRE Prep · Quant Prep · Daily Challenge · Arena · Leaderboard
• All guides · About · Pro · Merch · Privacy · Terms

JavaScript is needed to play.