⑺ 算盤的原本是自然

盤算數學教學指標

⑺ 算盤的原本是自然
充分必要沒有反例展現四則原本,
 +  -  ×  ÷ 算式意義是生活講師,
連續整數 前項A , 後項E ,
 E = A +1 , E - A = 1   代數基本式,
連續整數一個一數是象形即原本,
符號意義  + 和 , - 差 , × 積 , ÷ 商 ,
數學生活化,生活數學化 的含擴,
算盤象形是四則運算定律的明證,
算盤是記數法進位制的最棒工具,
ABCD 分段各檔珠數 , E 進位值 ,
一段算盤    E = A +1
二段        E = (A +1)×( B +1)
三        E = (A +1)×(B +1)×(C +1)
四     E = (A +1)×(B +1)×(C +1)×(D +1)

☆算盤的原本展現自然法則,,,

Computing Mathematics Teaching Indicators
⑺ abacus was originally natural
There is no need to reflect the four cases of the original,
 + - × ÷ formula meaning is life lecturer,
Continuous integer before the item A, after the item E,
 E = A +1, E - A = 1 algebraic basic,
Continuous integer one by one is the original shape that is,
Symbolic meaning + and, - poor, × product, ÷ business,
Mathematics life, life of the mathematical expansion,
The arithmetic of the abacus is the proof of the four laws of operation,
Abacus is the best tool for counting the carry system,
ABCD segment number of stalls, E carry value,
An abacus          E = A +1
Two segments  E = (A +1) × (B +1)
Three                  E = (A +1) × (B +1) × (C +1)
Four abacus      E = (A +1) × (B +1) × (C +1) × (D +1)
☆ abacus of the original show natural law ,,,