## Saturday, March 2, 2013

### Trick to remember the table of 19.

Trick to remember the table of 19.
Since it is easy to remember the table of 20. So you can obtain the table of 19 from table of 20.
To get table of 19 just minus the number from 20’s table for e.g. if you want to get value of 19 × 5 just minus the 5 from 20 × 5
19×5 = (20 × 5) -5 = 95.

20 × 1 =  20                                  19 ×1 =  (20-1)    =      19
20 × 2 =  40                                  19 × 2 = (40-2)    =      38
20 × 3  = 60                                  19 × 3 = (60-3)    =      57
20 × 4  =  80                                  19 × 4 = (80-4)   =      76
20 × 5  =  100                                19 × 5 = (100-5) =      95
20 × 6  =  120                                19 ×6 = (120-6)  =     114
20 × 7  =  140                                19 ×7 = (140-7)  =     133
20 × 8  =  120                                19 ×8 =(160-8)   =     152
20 × 9  =  180                                19 ×9 = (180-9)  =     171
20 × 10 = 200                               19 ×10 = (200-10) =     200

This trick can be further extended to 199,299,399 …… 1999.
Try it and share with others.

1. 2. whats the trick in that ?
these rules are valid for tables of all the numbers ...
18 X 1 = 18 and 19 X 1 = (18 X 1)+1
18 X 2 = 36 and 19 X 2 = (18 X 2)+2
18 X 3 = 54 and 19 X 3 = (18 X 3)+3
.
.
. and so on.