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No Plagiarism!V8SAAnCCGBDw65k5xNQ2posted on PENANA
主題:兩位數乘法運算8964 copyright protection135PENANAdLe3ZQttqF 維尼
*學生實用性:★★★8964 copyright protection135PENANApycj54gpSZ 維尼
*正常人實用性:★☆☆8964 copyright protection135PENANAQlibaEdX0f 維尼
*難易度:★★★8964 copyright protection135PENANAqREQpusZYK 維尼
先來看第一題:
照口訣操作即可8964 copyright protection135PENANAbRVYA9IhfX 維尼
個位:4X8=32,填328964 copyright protection135PENANAqYrfv9yQL2 維尼
十位:7X5=35,填358964 copyright protection135PENANA23Qq5iMxYG 維尼
交叉相乘再相加:7X8+5X4=76⮕填76 (從十位數開始往左填)8964 copyright protection135PENANAiLkqwpOw2A 維尼
最後相加起來,得到答案4292。就完成了!8964 copyright protection135PENANAn8vP5tNa1O 維尼
再看一題:8964 copyright protection135PENANAeOvFzk3dLb 維尼
8964 copyright protection135PENANA0q9Z8xGf84 維尼
個位:2X1=2,填02 (不足10需補零,不然會算錯)8964 copyright protection135PENANA7DvWcyHFP5 維尼
十位:1X6=6,填68964 copyright protection135PENANACB4AIEpLPn 維尼
交叉相乘再相加:1X1+2X6=13⮕填13 (從十位數開始往左填)8964 copyright protection135PENANAaCqprPOna2 維尼
最後相加起來,得到答案732。8964 copyright protection135PENANAudyMNBZkKY 維尼
最後來練習幾題吧:8964 copyright protection135PENANAjy91SmkCSg 維尼
答案在下方8964 copyright protection135PENANAG96vQs3MUA 維尼
139Please respect copyright.PENANAYC5KYUXOKZ
8964 copyright protection135PENANAfnICIprV0n 維尼
139Please respect copyright.PENANAZZpGBMkTxx
8964 copyright protection135PENANASEvwfIDJH0 維尼
139Please respect copyright.PENANAXN4mXeyc7P
8964 copyright protection135PENANAK62dwskMjW 維尼
139Please respect copyright.PENANAc8zndpk05N
8964 copyright protection135PENANABtOk3IH2OF 維尼
139Please respect copyright.PENANApMvafpCRn0
8964 copyright protection135PENANA4rkXO6XzHX 維尼

8964 copyright protection135PENANAtXy1vGCkZt 維尼
你答對了嗎?若有不懂的歡迎在留言區詢問8964 copyright protection135PENANATR0bdAiaXk 維尼
證明8964 copyright protection135PENANAHrM9vYxTiS 維尼
這裡用圖形解釋給大家聽:37X45是不是等於一個長45寬37的長方形面積!8964 copyright protection135PENANAb9A1Jgzf6a 維尼
現在把長方形切成4分,黑色為邊長,白色為面積。8964 copyright protection135PENANAgX5t2FW987 維尼
先看個位:7X5=紫色長方形面積8964 copyright protection135PENANAnRSo0JkQec 維尼
十位:30X40=藍色長方形面積8964 copyright protection135PENANAbAlBsR0IlP 維尼
交叉相乘再相加:兩個橘色長方形面積8964 copyright protection135PENANASxjL3JOrZ9 維尼
另外也能用(a+b)(c+d)=ac+ad+bc+bd來解釋:8964 copyright protection135PENANA6JmovUvjfk 維尼
(30+7)(40+5)=1200+150+280+35=16658964 copyright protection135PENANACjevzIvi86 維尼
今天學會了兩位數乘法運算,任何兩個兩位數相乘都能用喔~8964 copyright protection135PENANAESQ5T0uXcG 維尼
3.148.206.183
ns3.148.206.183da2