Vedic Maths : Ekanyunena Purvena

Vedic Maths : Ekanyunena Purvena

Ekanyunena Purvena

'One less than the previous' or 'One less than the one before'

एकन्यूनेन पूर्वेन

Now we will cover special case of multiplying with ( x - 1)

A = a and B = x - 1

So A * B = a * ( x - 1)

= ax - a = ax - x + x - a = x * (a - 1) + ( x - a)

Here are examples

A = a	B = x - 1	n	a - 1	*x ( a – 1 )**	x - a
10	9	1	9	90	9
2	9	1	1	10	8
3	9	1	2	20	7
4	9	1	3	30	6
5	9	1	4	40	5
6	9	1	5	50	4
7	9	1	6	60	3
8	9	1	7	70	2
9	9	1	8	80	1
11	99	2	10	1000	89
12	99	2	11	1100	88
13	99	2	12	1200	87
14	99	2	13	1300	86
15	99	2	14	1400	85
16	99	2	15	1500	84
17	99	2	16	1600	83
18	99	2	17	1700	82
19	99	2	18	1800	81
20	99	2	19	1900	80
77	99	2	76	7600	23
979	999	3	978	978000	21
777	999	3	776	776000	223
9879	9999	4	9878	98780000	121
1203579	9999999	7	1203578	12035780000000	8796421
9765431	9999999	7	9765430	97654300000000	234569
1234567809	9999999999	10	1234567808	12345678080000000000	8765432191
7	99	2	6	600	93
79	999	3	78	78000	921
798	99999	5	797	79700000	99202
79	9999999	7	78	780000000	9999921

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