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No Plagiarism!CI0EAVc0mvVDVvQJGCsLposted on PENANA
主題:兩位數乘法運算8964 copyright protection183PENANA76jeRA27UU 維尼
*學生實用性:★★★8964 copyright protection183PENANASxGktuUlNG 維尼
*正常人實用性:★☆☆8964 copyright protection183PENANAoPm7ZsBbz1 維尼
*難易度:★★★8964 copyright protection183PENANATPRt45hJ5p 維尼
先來看第一題:
照口訣操作即可8964 copyright protection183PENANAC5Nn3TeIVo 維尼
個位:4X8=32,填328964 copyright protection183PENANAfo2FT7ySRF 維尼
十位:7X5=35,填358964 copyright protection183PENANAswS7SBvVgH 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 protection183PENANAutaTtfWOSO 維尼
最後相加起來,得到答案4292。就完成了!8964 copyright protection183PENANALqOvpllGbT 維尼
再看一題:8964 copyright protection183PENANAHiYahV421a 維尼
8964 copyright protection183PENANAS6XlQkiLXa 維尼
個位:2X1=2,填02 (不足10需補零,不然會算錯)8964 copyright protection183PENANA92xi9xoJiC 維尼
十位:1X6=6,填68964 copyright protection183PENANA89tGbwTcHs 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 protection183PENANATyA1hODAPR 維尼
最後相加起來,得到答案732。8964 copyright protection183PENANAM5VMDl2gLD 維尼
最後來練習幾題吧:8964 copyright protection183PENANA2VUNfUKBmk 維尼
答案在下方8964 copyright protection183PENANAwrA76XIZZa 維尼
187Please respect copyright.PENANAswiG3Joq6D
8964 copyright protection183PENANArbwP4xGKK6 維尼
187Please respect copyright.PENANAby1ivTdzJp
8964 copyright protection183PENANA1RJJWlCE84 維尼
187Please respect copyright.PENANAVcdZugDg0j
8964 copyright protection183PENANAyfnRucrQlR 維尼
187Please respect copyright.PENANAmykukL3v1a
8964 copyright protection183PENANATnWL7IFXpG 維尼
187Please respect copyright.PENANA4bYTJRa4u3
8964 copyright protection183PENANAf225FCRmni 維尼

8964 copyright protection183PENANALifdNfnYbn 維尼
你答對了嗎?若有不懂的歡迎在留言區詢問8964 copyright protection183PENANAENhAnpNfdD 維尼
證明8964 copyright protection183PENANA1YqhCtz3aF 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 protection183PENANA7xQPGQAWxM 維尼
現在把長方形切成4分,黑色為邊長,白色為面積。8964 copyright protection183PENANA6Te8DuPOwa 維尼
先看個位:7X5=紫色長方形面積8964 copyright protection183PENANAhBMYFYHmO7 維尼
十位:30X40=藍色長方形面積8964 copyright protection183PENANAC3bqCm6VVp 維尼
交叉相乘再相加:兩個橘色長方形面積8964 copyright protection183PENANAWMx0ewogRA 維尼
另外也能用(a+b)(c+d)=ac+ad+bc+bd來解釋:8964 copyright protection183PENANAu9tFfsMgJe 維尼
(30+7)(40+5)=1200+150+280+35=16658964 copyright protection183PENANAL3czuPS6qU 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 protection183PENANA1yVGZ8apZm 維尼
216.73.216.34
ns216.73.216.34da2