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Hi,
I’m really struggling to understand the DD Method – finding out Odd and Even in particular.
I get that you use the first digit to the left of the decimal point in the odd place, but what about the the other digits?
How do you know which are odd and which are even?
Some examples would be helpful.
Thanks
You must alternate between odd and even.
For example let’s take
9876.1234
Odd is marked as O.
Even is marked as E.
9 8 7 6 . 1 2 3 4
E O E O . E O E O
You start alternating from the left of the decimal place which is odd.
Hope this clarifies
Hi,
Step 3 of the DD tells us to add 11 to a negative result.
At the same time, it reminds us that, in the end, we should get a single-digit number.
I cannot reconcile these two requirements with the number 10.
Please help!
Hi Salvador
For 10 just keep the digit difference as -1 and the technique should still work.
Example for Addition
16 + 10 = 26
Digit difference of 16 = 5
Digit difference of 10 = -1
5 – 1 = 4
Digit difference of 26 = 4
Example for Subtraction
16 – 10 = 6
Digit difference of 16 = 5
Digit difference of 10 = -1
5 – (-1) = 6
Digit difference of 6 = 6
Example for Multiplication
16 x 10 = 160
Digit difference of 16 = 5
Digit difference of 10 = -1
5 x (-1) = -5
Digit difference of 160 = 1 – 6 = -5
Hope this answers your question
Thank you very much, Abhishek,
For your prompt reply and clarification.
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