教學指標(1)

易算盤教數學   教學指標

(1)自然法則即原本
算盤歸零如同水往低處流的原本,
重力使上翻往下,下翻往上皆歸零,
0 1 2 3 4 5 6 7 8 9 連續數是加法,
9 8 7 6 5 4 3 2 1 0 倒數就是減法,
加減相反,即 + - 互逆,
加往上則減往下,加往下則減往上,
充分且必要,展現原本即自然。
如圖:九珠十進算盤的二種歸零法,
面對面的對打教學盤。

Computing math
Mathematics Teaching Index
(1) the natural law that the original
Abacus as water to the low flow of the original,
Gravity to turn down,
the next turn up to zero,
0 1 2 3 4 5 6 7 8 9
Continuous number is added,
9 8 7 6 5 4 3 2 1 0
The countdown is subtraction,
Addition and subtraction is the opposite, that is,
+ - Plus the next is reduced down,
plus the next is reduced to the last,
Full and necessary,
to show the original natural.
Figure: nine beads decathlon two zero method,
Face-to-face teaching.