Mental Math Speed Trainer

The Mental Math Secrets Used in This Game

Speed arithmetic is not about raw memorization—it is about clever numerical restructuring:

• The 11s Trick: For any 2-digit number $ab \times 11$, split the digits $a$ and $b$, and place their sum $(a + b)$ in the middle! For example: $43 \times 11 \rightarrow 4 \ [4+3] \ 3 = 473$.
• Doubling & Halving: Cut one number in half and double the other. $16 \times 25 = 8 \times 50 = 4 \times 100 = 400$.
• Left-to-Right Addition: School taught us to add from right to left, but the human brain processes large values first. $47 + 38 = (40 + 30) + (7 + 8) = 70 + 15 = 85$.