The rule for multiplying by 6 is: Add the digit to half of its neighbor, plus 5 if the digit itself is odd.
This combines the concepts from the rule for 5 and the rule for 11.
Add a leading zero: 0254.
The final answer is 1,524.
Enter any number to see the step-by-step method.
The 'neighbor' is always the digit immediately to the right of the digit you are currently working on. For the rightmost digit of the number, its neighbor is considered to be 0.
This is a clever trick to handle decimals without actually using them. It mathematically compensates for the .5 that is dropped when taking 'half of the neighbor' if the neighbor is odd, along with other factors, to keep the calculation correct.
Yes, this is the most common point of confusion. You always start with the digit you are working on, and then you add the other parts (half the neighbor, 5 for odd digits, and the carry) to it.
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The 'neighbor' is always the digit immediately to the right of the digit you are currently working on. For the rightmost digit of the number, its neighbor is considered to be 0.
This is a clever trick to handle decimals without actually using them. It mathematically compensates for the .5 that is dropped when taking 'half of the neighbor' if the neighbor is odd, along with other factors, to keep the calculation correct.
Yes, this is the most common point of confusion. You always start with the digit you are working on, and then you add the other parts (half the neighbor, 5 for odd digits, and the carry) to it.