I'd do that kind of math as: 53ˆ2 = 50x50 + 3x50 + 3x50 + 3x3. No "trick" to remember (well perhaps that 5050 is like 55 plus that many zeroes at the end of the

I'd do that kind of math as: 53ˆ2 = 50x50 + 3x50 + 3x50 + 3x3. No "trick" to remember (well perhaps that 5050 is like 55 plus that many zeroes at the end of the result)