Adding a zero
Multiplying by 10 feels like magic: 34 × 10 is just 340 — slide a zero on the end. Once you see the pattern, whole rows of the times table become effortless.
Zero and mirror tricks
×10 appends a zero. ×11 for a single digit doubles the digit (3×11=33); for two digits, add the digits in the middle (23×11 = 2_(2+3)_3 = 253).