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1. 10 by 10:
formula: head by head, Oka O, O O.
example: 12 × 14=?The
solution: 1 * 1=1
2 + 4 = 6
2 * 4 = 8
12 × 14=168
note: a bit multiply, not two digits to 0 occupancy.
2 the same, Ogo (Oai Ka is equal to 10):
formula: a head and 1, head by head, O O.
example: 23 × 27=?The
solution: 2 + 1 = 3
2 * 3 = 6
3 * 7 = 21
23 × 27=621
note: a bit multiply, not two digits to 0 occupancy.
3 the first multiplier complementary, another multiplier same number:
formula: a head and 1, head by head Vente de maillots de football, O O.
example: 37 × 44=?
: 3+1=4
  cravatta Lv; 4 * 4=16
7 * 4=28
37 × 44=1628
note: a bit multiply, not two digits to 0 occupancy.
4 by dozens of dozens of:
formula: head by head, head and head, O O.
example: 21 × 41=?The
solution: 2 * 4=8
2+4=6
1 * 1=1
21 * 41=861
5.11 by any number:
formula: both fixed whereabouts, middle and down.
example: 11 × 23125=?
: 2+3=5
3+1=4
1+2=3
2+5=7
2 and 5 respectively in the
11 * 23125=254375
& nbsp; note: full ten to one.
6 dozen by arbitrary number:
  Cravate de soie homme Paul Smith;   solde casquettes Burberry; formula: second multiplier first not trend of falling, a multiplied by second factor behind the first factor of each number, Ka Shimoto number, and then to fall.
example: 13 × 326=?Solution:
13 is 3
  chapeaux ralph lauren baseball pas cher; 3 * 3+2=11
3 * 2+6=12
3 * 6=18
13 * 326=4238
note: and over ten to enter a.  Robes de Soirée Pas Cher;