9 Times Table Trick:
Hold up your hands. To calculate 9×4, lower your 4th finger. You'll have 3 fingers up before it and 6 after it, so 36!
Doubling Strategy:
For 4×, double the number twice. For 8×, double three times. Example: 8×6 = (6×2)×2×2 = 48
11 Times Table Trick:
For 11× a two-digit number (where sum of digits < 10), separate the digits and put their sum in the middle. Example: 11×25 = 2 (2+5) 5 = 275
5 Times Table Shortcut:
Multiply by 10 and then halve the result. Example: 5×7 = (10×7)/2 = 35
Squares Pattern:
The difference between consecutive squares increases by 2 each time: 1, 4, 9, 16, 25... (differences: 3, 5, 7, 9...)