Zero - 2 (Subtraction)
Dear All, Continuing on our series of different methods of dealing with calculations. Taking help mainly from Vedic Mathematics, then from Abacus and other ancient techniques. They work fine . Subtraction: - We do from left to right . As we read from left to right, why do we do math from right to left? The endeavor here is to develop from left to right . It builds speed . Eg: - 26-5 = 21, 26-9 =? Generally we borrow from the ten 's digit and then do 16-9=7 for the unit 's place . Then we get answer 17. But now, we do subtraction by 10's compliments . 1 9, 2 8, 3 7, 4 6, 5 5 are compliments as they add up to 10. Now for 26 - 9 = 26 - 09 = 2/ 7 = 17. 2-0=2 , as 9 is greater than 6 . We take the compliment of 9 ie 1 and add it to 6 to get 7 . Now whenever you use compliments slash the digit on the left ie reduce it by 1 . Here 2-1=1 . So the final answer is 17. Eg:- 5643 ...