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Reprinted from alumni of the user at 04:03 on October 16,
red wing shoes online, 2010 Reading (loading. ..) Comments (0) Category: Personal Diary
1. ten by ten:
formulas: the head by head, tail plus tail, tail by tail.
Example: 12 × 14 =?
solution: 1 × 1 = 1
2 +4 = 6
2 × 4 = 8
12 × 14 = 168
Note: a bit multiply , not use the 0 digit placeholder.
2. head the same, complementary tail (tail add up to 10):
formulas: a first add 1 to the head by head, tail by tail.
Example: 23 × 27 =?
Solution: 2 +1 = 3
2 × 3 = 6
3 × 7 = 21
23 × 27 = 621
Note: a bit multiply, not two 0 placeholder number to use.
3. complementary first multiplier, the same as the other multiplier:
formulas: a first add 1 to the head by head,
red wing shoes, tail by tail.
Example: 37 × 44 =?
solution: 3 +1 = 4
4 × 4 = 16
7 × 4 = 28
37 × 44 = 1628
Note: a bit multiply,
red wing shoes outlet, not use the 0 digit placeholder.
4. dozens of dozens of one by one:
formulas: head by head, head plus head,
red wing store, tail by tail.
Example: 21 × 41 =?
solutions: 2 × 4 = 8
2 +4 = 6
1 × 1 = 1
21 × 41 = 861
5.11 by any number:
formulas: sum of fixed fate, and the middle of the drop-down.
Example: 11 × 23125 =?
Solution: 2 +3 = 5
3 +1 = 4
1 +2 = 3
2 +5 = 7
2 and 5, respectively,
red wing heritage, in the sum of
11 × 23125 = 254375
Note: and over ten to further.
6. dozen by any number:
formulas: the first is not the second multiplier falling trend,
red wing heritage boot, the first digit multiplied by the factor behind the second factor of each number, plus the next digit, again missing.
Example: 13 × 326 =?
solution: 13 bits is 3
3 × 3 +2 = 11
3 × 2 +6 = 12
; 3 × 6 = 18
13 × 326 = 4238
Note: and over ten to get into one.
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