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卓龍 | 22nd May 2014, 15:10 PM | 置頂文章, 數學 | (81 Reads)

Wilson Subtraction Method:

卓龍減數法︰ 

Fundamental Method: Decimal System, 10 minus no. to be subtracted.

基本計算法十進制以十減被減數

e.g.  例子︰ 

  93641-58792=34849 

個位數1-2,減數1減被減數2不夠減,借十位即11-2=9

Singular digit 1-2, 2 is not enough to be subtracted by 1, lend from decimal digit 11-2=9. 

十位數4-9,細數已借位4-1=3,減數3減被減數9不夠減,用公式3+(10-9)=3+1=4

Decimal digit 4-9, 4 lent one to the singular digit 4-1=3, 9 is not enough to be subtracted by 3, use the formula 3+(10-9)=3+1=4. 

 93641-58792=34849

百位數6-7,細數已借位6-1=5,減數5減被減數7不夠減,用公式5+(10-7)=5+3=8

Hundredth digit 6-7, 6 lent one to the decimal digit 6-1=5, 7 is not enough to be subtracted by 5, use the formula 5+(10-7)=5+3=8.

千位數3-8,細數已借位3-1=2,減數2減被減數8不夠減,用公式2+(10-8)=2+2=4

Thousandth digit 3-8, 3 lent one to the hundredth digit 3-1=2, 8 is not enough to be subtracted by 2, use the formula 2+(10-8)=2+2=4.

  93641-58792=34849 

萬位數9-5,細數已借位9-1=8,8-5=3

Ten thousandth digit 9-5, 9 lent one to the thousandth digit 9-1=8, 5 is enough to be subtracted by 8, so simply 8-5=3.

 

Advanced method: 9 minus no. to be subtracted 

進階計算法以9減被減數

  93641-58792=34849 

個位數1-2,減數1減被減數2不夠減,借十位即11-2=9

Singular digit 1-2, 2 is not enough to be subtracted by 1, lend from decimal digit 11-2=9.

十位數4-9減數4減被減數9不夠減,用公式4+(9-9)=4+0=4

Decimal digit 4-9, 9 is not enough to be subtracted by 4, use formula 4+(9-9)=4+0=4. 

  93641-58792=34849 

百位數6-7,減數6減被減數7不夠減,用公式6+(9-7)=6+2=8

Hundredth digit 6-7, 7 is not enough to be subtracted by 6, use formula 6+(9-7)=6+2=8.

千位數3-8,減數3減被減數8不夠減,用公式3+(9-8)=3+1=4

Thousandth digit 3-8, 8 is not enough to be subtracted by 3, use formula 3+(9-8)=3+1=4.

  93641-58792=34849

萬位數9-5,細數已借位9-1=8,8-5=3

Ten thousandth digit 9-5, 9 is lent one to the thousandth digit 9-1=8, 5 is enough to be subtracted by 8, so simply 8-5=3. 

 

二進制以二減被減數,三進制以三減被減數,四進制以四減被減數,以此類推至無限進制以無限進制減被減數。

Binary digital system: 2 minus numbers to be subtracted.

3 digital system: 3 minus numbers to be subtracted.

4 digital system: 4 minus numbers to be subtracted

and so on to infinitive digital system. 

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