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No Plagiarism!MlWtaPW6z21lNnUayuasposted on PENANA
主題:兩位數乘法(特殊2)8964 copyright protection194PENANAt4mHxZ8nAu 維尼
*學生實用性:★★☆8964 copyright protection194PENANAo5GXOYRZvV 維尼
*正常人實用性:★☆☆8964 copyright protection194PENANArQbltEj79Z 維尼
*難易度:★☆☆8964 copyright protection194PENANAlrncufg0wO 維尼
條件:(符合才可使用)8964 copyright protection194PENANAYQNtwrUpCE 維尼
1.個位數相加為108964 copyright protection194PENANA5ieE3OfvMK 維尼
2.十位數相同8964 copyright protection194PENANAOEQS0ztpVo 維尼
8964 copyright protection194PENANAssoGPanojO 維尼
照口訣操作即可8964 copyright protection194PENANA4M13pyJJOb 維尼
個位:4X6=24,填248964 copyright protection194PENANATiNGzDahzW 維尼
十位:7X7=49,填498964 copyright protection194PENANA2XxxoJIxjG 維尼
再加十位(7)到百位⮕填78964 copyright protection194PENANA2kh9k88G7o 維尼
最後相加起來,得到答案5624。大功告成,很簡單吧!8964 copyright protection194PENANATPQ3q7ZTbQ 維尼
198Please respect copyright.PENANAgtmYmzUowL
8964 copyright protection194PENANAWdLhfbAvvn 維尼
方法2:相乘個位,其餘部分都是n*(n+1)8964 copyright protection194PENANA472oRxRwSh 維尼
在這裡n=十位數字,以此題為例:8964 copyright protection194PENANAVwjLumA2DX 維尼
相乘個位:4X6=248964 copyright protection194PENANAJrpSTnziyM 維尼
其餘=n*(n+1)=7X(7+1)=56 答:56248964 copyright protection194PENANAinBa1TS1u0 維尼
方法2只要有背九九乘法表就能算。兩種方法都能用喔!8964 copyright protection194PENANA1bqyOfyRHM 維尼
再來一題:8964 copyright protection194PENANA5giBs5hsa1 維尼
8964 copyright protection194PENANA734cY2HRQX 維尼
照口訣操作即可8964 copyright protection194PENANARRylfnhxrP 維尼
個位:8X2=16,填16 8964 copyright protection194PENANAw03gmmJEDL 維尼
十位:2X2=4,填48964 copyright protection194PENANATiizan2ORd 維尼
再加十位(2)到百位⮕填28964 copyright protection194PENANAOIPbrUbi7d 維尼
最後相加起來,得到答案616。大功告成,很簡單吧!8964 copyright protection194PENANAmBmGRbIep4 維尼
198Please respect copyright.PENANAk1ONqeE4r5
8964 copyright protection194PENANAJJACY58mTe 維尼
方法2:相乘個位,其餘部分都是n*(n+1)8964 copyright protection194PENANA4eSoVibMR3 維尼
在這裡n=十位數字:8964 copyright protection194PENANAFZ3Hh4ISFX 維尼
相乘個位:8X2=168964 copyright protection194PENANA7KSsNSY8rd 維尼
其餘=n*(n+1)=2X(2+1)=6 答:6168964 copyright protection194PENANAfzo1KnIVsO 維尼
小試身手,前期不熟建議用紙筆幫忙,熟練後便可直接算了。另外本人較推薦方法二。8964 copyright protection194PENANA1zL4gCQ5YE 維尼
答案在下方8964 copyright protection194PENANAQMPMSA6zV2 維尼
198Please respect copyright.PENANA8OUzT3GX8J
8964 copyright protection194PENANAY3EzAb6CV7 維尼
198Please respect copyright.PENANAnsxXToRqqt
8964 copyright protection194PENANA6yZ9v4zG9q 維尼
198Please respect copyright.PENANA61REjmrm1z
8964 copyright protection194PENANAZELrAOMEUM 維尼
198Please respect copyright.PENANAU8F0BsnqSp
8964 copyright protection194PENANACLGY3uP98i 維尼
198Please respect copyright.PENANA0GW5HA4kdz
8964 copyright protection194PENANAwleDzi0Yk5 維尼
8964 copyright protection194PENANAjLMUrWBouT 維尼
第一題(51X59)注意一下:8964 copyright protection194PENANA7jD2WzxP1e 維尼
個位:1X9=9,填09 (不足10需補零,不然會算錯)8964 copyright protection194PENANA7djmJEfscM 維尼
十位:5X5=25,填25 8964 copyright protection194PENANAtvU4XChR3L 維尼
再加十位(5)到百位⮕填58964 copyright protection194PENANAbEOCgiTnrX 維尼
最後相加起來,得到答案3009。8964 copyright protection194PENANAwoHGReWNNk 維尼
198Please respect copyright.PENANAeApyFa1yrq
8964 copyright protection194PENANAMniSO6swwq 維尼
方法2:相乘個位,其餘部分都是n*(n+1)8964 copyright protection194PENANAQwSReOpoGc 維尼
在這裡n=十位數字:8964 copyright protection194PENANAGLz5YTiF81 維尼
相乘個位:1X9=09 (不足10需補零,不然會算錯)8964 copyright protection194PENANACqBR0gpbHw 維尼
其餘=n*(n+1)=5X(5+1)=30 答:30098964 copyright protection194PENANABoaI8HVd84 維尼
198Please respect copyright.PENANAWD52ZV1aeA
8964 copyright protection194PENANAYNnofG2rWt 維尼
你答對了嗎?若有不懂的歡迎在留言區詢問8964 copyright protection194PENANA94rzjiALZ6 維尼
證明8964 copyright protection194PENANAgYPEAzkfJT 維尼
這裡也一樣用圖形解釋:34X36是不是等於一個長36寬34的長方形面積!8964 copyright protection194PENANAZlut3QxlYm 維尼
現在把長方形切成4分,黑色為邊長,白色為面積。8964 copyright protection194PENANAMWs1i5Xgud 維尼
先看個位:4X6=紫色正方形面積8964 copyright protection194PENANAVH81iahLur 維尼
十位:30X30=藍色長方形面積8964 copyright protection194PENANAKtXLiSp4fX 維尼
再加十位到百位:兩個橘色長方形面積8964 copyright protection194PENANAqrCltaF4kR 維尼
你可能發現,怎麼從兩位數平方運算和兩位數乘法(特殊1)都是用圖形解釋,口訣也差不多,因為其實他們都是某種速算方式的延伸,之後會再介紹。8964 copyright protection194PENANAN6sf876f3Q 維尼
以上就是今天的兩位數乘法(特殊2),謝謝各位。8964 copyright protection194PENANA2AHGyvVdM4 維尼
216.73.216.203
ns216.73.216.203da2