(4)地球算盤通行無阻

⑷算盤無國界
易算盤數位分明計算簡單通行地球,
 1500年前印度人發明阿拉伯數字,
 0123456789,"十"進制 統一了地球,
每個位數都有 0~9 共 "十" 個數碼,,,
 10=1+9,     +9=+10-1,     +1=+10-9
 10=2+8,     +8=+10-2,     +2=+10-8
 10=3+7,     +7=+10-3,     +3=+10-7
 10=4+6,     +6=+10-4,     +4=+10-6
 10=5+5,     +5=+10-5,
 -5=-10+5,     -6=-10+4,     -7=-10+3
 -8=-10+2,     -9=-10+1,     -1=-10+9
 -2=-10+8,     -3=-10+7,     -4=-10+6
口訣:各檔滿十, 進位加1及借位減1,
 23+88=23+80  +10-2 =111
聚化速算  20+90 +3-2 =111
 74-36=74 -30 -10+4=38
聚化速算   74  -40+4=38
 51-19=51 -10 -10+1=32
聚化速算    51 -20+1=32
  201- 112 = 101 - 12
速算          = 101 - 20 +8 = 89
每個位數方法相同,依此類推,,,
因為十進數各個位名都有十個數碼,
按九珠十進盤面 : 口訣就是"補十",
( 1,9 ),( 2,8 ),( 3,7 ),( 4,6 ),( 5,5 )。

⑷ abacus without borders
Easyabacus the number of clear calculation of the passage of the Earth,
 1500 years ago the Indian invented the Arabic numerals,
 0123456789, "ten" into the system unified the earth,
Each bit has 0 to 9 a total of "ten" digital ,,,
 10 = 1 + 9, + 9 = + 10-1, + 1 = + 10-9
 10 = 2 + 8, +8 = +10-2, +2 = +10-8
 10 = 3 + 7, + 7 = + 10-3, +3 = +10-7
 10 = 4 + 6, +6 = +10-4, +4 = +10-6
 10 = 5 + 5, +5 = +10-5,
 -5 = -10 + 5, -6 = -10 + 4, -7 = -10 + 3
 -8 = -10 + 2, -9 = -10 + 1, -1 = -10 + 9
 -2 = -10 +8, -3 = -10 +7, -4 = -10 + 6
formulas: the file full of ten, carry plus 1 and borrow by 1,
 23 + 88 = 23 + 80 + 10-2 = 111
Aggregation speed calculation
20 +90 +3-2 = 111
 74-36 = 74 -30 -10 + 4 = 38
Aggregation speed count
 74 -40 + 4 = 38
 51-19 = 51 -10 -10 + 1 = 32
Aggregation speed count
 51-20 + 1 = 32
 201 - 112 = 101 - 12
Express     = 101 - 20 +8 = 89
Each bit of the same method, and so on, and so on ,,,
Because the decimal number of each bit name has ten digital,
According to nine beads into the disk: formula is "make up ten"
(1, 9), (2, 8), (3,7), (4,6), (5,5).