☀️
← Back to quiz
Math Tricks
Fast mental math techniques — learn them, then go prove it.
1
Multiplying by 11
e.g. 386 × 11
2
Squaring numbers ending in 5
e.g. 85²
3
Multiplying by 12
e.g. 386 × 12
4
Multiplying by 5
e.g. 76 × 5
5
Special 2-digit × 2-digit
e.g. 42 × 48