[Script Info]
Title: 
[Events]
Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
Dialogue: 0,0:00:00.53,0:00:01.67,Default,,0000,0000,0000,,如果之前的練習你都做了
Dialogue: 0,0:00:01.67,0:00:04.73,Default,,0000,0000,0000,,並且已經記住了乘法表
Dialogue: 0,0:00:04.73,0:00:08.78,Default,,0000,0000,0000,,那麽你應該有這種感覺
Dialogue: 0,0:00:08.78,0:00:11.06,Default,,0000,0000,0000,,可能自己已經可以解決任何乘法問題了！
Dialogue: 0,0:00:11.06,0:00:12.70,Default,,0000,0000,0000,,你只需要記住--
Dialogue: 0,0:00:12.70,0:00:14.34,Default,,0000,0000,0000,,怎麽說呢--
Dialogue: 0,0:00:14.35,0:00:15.84,Default,,0000,0000,0000,,記住運算的一般步驟就可以了
Dialogue: 0,0:00:15.84,0:00:17.76,Default,,0000,0000,0000,,但是我不是要教大家做題步驟
Dialogue: 0,0:00:17.76,0:00:20.28,Default,,0000,0000,0000,,而是這種運算的本質和原理
Dialogue: 0,0:00:20.28,0:00:23.42,Default,,0000,0000,0000,,先來做一些
Dialogue: 0,0:00:23.42,0:00:30.12,Default,,0000,0000,0000,,你可能覺得自己不會的題目吧
Dialogue: 0,0:00:30.12,0:00:31.86,Default,,0000,0000,0000,,16×9
Dialogue: 0,0:00:31.86,0:00:32.86,Default,,0000,0000,0000,,16乘以9
Dialogue: 0,0:00:32.86,0:00:36.00,Default,,0000,0000,0000,,你可以會說
Dialogue: 0,0:00:36.00,0:00:38.79,Default,,0000,0000,0000,,老師 我沒有記住16的乘法表
Dialogue: 0,0:00:38.79,0:00:41.21,Default,,0000,0000,0000,,不可能會做這個題
Dialogue: 0,0:00:41.21,0:00:43.29,Default,,0000,0000,0000,,但是我要告訴你的是
Dialogue: 0,0:00:43.29,0:00:45.26,Default,,0000,0000,0000,,你一定會做！
Dialogue: 0,0:00:45.26,0:00:46.53,Default,,0000,0000,0000,,因爲我們可以把這個問題分解成
Dialogue: 0,0:00:46.53,0:00:49.71,Default,,0000,0000,0000,,你會做的題目
Dialogue: 0,0:00:49.71,0:00:52.24,Default,,0000,0000,0000,,到底怎麽做呢？
Dialogue: 0,0:00:52.25,0:00:54.82,Default,,0000,0000,0000,,首先是9乘以這個數的個位
Dialogue: 0,0:00:54.82,0:00:56.76,Default,,0000,0000,0000,,9×6
Dialogue: 0,0:00:56.77,0:01:01.09,Default,,0000,0000,0000,,這個大家肯定都會的
Dialogue: 0,0:01:01.10,0:01:03.38,Default,,0000,0000,0000,,我寫在這邊
Dialogue: 0,0:01:03.38,0:01:05.86,Default,,0000,0000,0000,,9×6=54
Dialogue: 0,0:01:05.86,0:01:08.98,Default,,0000,0000,0000,,知道乘法表就可以得出來
Dialogue: 0,0:01:08.98,0:01:11.94,Default,,0000,0000,0000,,那麽要寫下54來
Dialogue: 0,0:01:11.94,0:01:13.71,Default,,0000,0000,0000,,但是只能把4寫在個位這裡
Dialogue: 0,0:01:13.71,0:01:17.00,Default,,0000,0000,0000,,5是進位
Dialogue: 0,0:01:17.00,0:01:19.76,Default,,0000,0000,0000,,這就是運算的步驟
Dialogue: 0,0:01:19.76,0:01:21.11,Default,,0000,0000,0000,,在做加法時
Dialogue: 0,0:01:21.13,0:01:24.11,Default,,0000,0000,0000,,如果産生了大於9的數
Dialogue: 0,0:01:24.11,0:01:28.43,Default,,0000,0000,0000,,就要進位
Dialogue: 0,0:01:28.43,0:01:29.33,Default,,0000,0000,0000,,這種運算就是進位 沒什麽別的描述方法了
Dialogue: 0,0:01:29.33,0:01:31.16,Default,,0000,0000,0000,,然後9×1
Dialogue: 0,0:01:31.16,0:01:33.49,Default,,0000,0000,0000,,9乘以1
Dialogue: 0,0:01:33.50,0:01:35.65,Default,,0000,0000,0000,,這個很簡單
Dialogue: 0,0:01:35.65,0:01:38.67,Default,,0000,0000,0000,,9×1=9
Dialogue: 0,0:01:38.68,0:01:40.74,Default,,0000,0000,0000,,任何數乘以1都等於本身
Dialogue: 0,0:01:40.75,0:01:45.14,Default,,0000,0000,0000,,但是上邊還有個進位5
Dialogue: 0,0:01:45.14,0:01:47.10,Default,,0000,0000,0000,,9×1=9
Dialogue: 0,0:01:47.10,0:01:50.16,Default,,0000,0000,0000,,還要再加上5
Dialogue: 0,0:01:50.16,0:01:55.64,Default,,0000,0000,0000,,所以再加5
Dialogue: 0,0:01:55.64,0:01:57.70,Default,,0000,0000,0000,,得到什麽呢？
Dialogue: 0,0:01:57.70,0:01:59.69,Default,,0000,0000,0000,,9×1+5
Dialogue: 0,0:01:59.69,0:02:00.59,Default,,0000,0000,0000,,得14
Dialogue: 0,0:02:00.59,0:02:04.18,Default,,0000,0000,0000,,我寫在這裡
Dialogue: 0,0:02:04.18,0:02:06.53,Default,,0000,0000,0000,,14
Dialogue: 0,0:02:06.53,0:02:08.44,Default,,0000,0000,0000,,這樣就得出結果了
Dialogue: 0,0:02:08.44,0:02:12.26,Default,,0000,0000,0000,,16×9=144
Dialogue: 0,0:02:12.26,0:02:14.66,Default,,0000,0000,0000,,如果你一直記到12的乘法表的話
Dialogue: 0,0:02:14.66,0:02:17.50,Default,,0000,0000,0000,,應該要注意到144=12×12
Dialogue: 0,0:02:17.50,0:02:19.22,Default,,0000,0000,0000,,不過只知道9×6和9×1
Dialogue: 0,0:02:19.22,0:02:20.54,Default,,0000,0000,0000,,也可以解出這個難題
Dialogue: 0,0:02:20.55,0:02:22.16,Default,,0000,0000,0000,,現在你可能說 老師
Dialogue: 0,0:02:22.16,0:02:25.15,Default,,0000,0000,0000,,這不過是你耍的一個小把戲
Dialogue: 0,0:02:25.15,0:02:27.92,Default,,0000,0000,0000,,這怎麽可能呢？是爲什麽？
Dialogue: 0,0:02:27.93,0:02:32.87,Default,,0000,0000,0000,,大家應該經常這麽問
Dialogue: 0,0:02:32.87,0:02:34.98,Default,,0000,0000,0000,,不要只是被動的接受我說的話
Dialogue: 0,0:02:34.99,0:02:36.93,Default,,0000,0000,0000,,不要死記公式方法
Dialogue: 0,0:02:36.93,0:02:37.86,Default,,0000,0000,0000,,生搬硬套
Dialogue: 0,0:02:37.86,0:02:40.76,Default,,0000,0000,0000,,那麽 我換個寫法給大家解釋一下
Dialogue: 0,0:02:40.77,0:02:44.19,Default,,0000,0000,0000,,可以把16改成10--
Dialogue: 0,0:02:44.19,0:02:46.96,Default,,0000,0000,0000,,在這裡寫吧
Dialogue: 0,0:02:46.96,0:02:50.83,Default,,0000,0000,0000,,16=10+6
Dialogue: 0,0:02:50.84,0:02:52.81,Default,,0000,0000,0000,,把16拆開了
Dialogue: 0,0:02:52.81,0:02:56.49,Default,,0000,0000,0000,,當然9也可以拆
Dialogue: 0,0:02:56.50,0:02:59.58,Default,,0000,0000,0000,,不過只是一位數 可以留著
Dialogue: 0,0:02:59.59,0:03:00.99,Default,,0000,0000,0000,,就像這樣
Dialogue: 0,0:03:00.99,0:03:02.88,Default,,0000,0000,0000,,下面來看看這個問題究竟怎麽回事
Dialogue: 0,0:03:02.88,0:03:04.39,Default,,0000,0000,0000,,在這寫一個乘法號
Dialogue: 0,0:03:04.40,0:03:06.05,Default,,0000,0000,0000,,首先要用9乘以6
Dialogue: 0,0:03:06.06,0:03:08.31,Default,,0000,0000,0000,,你可能要問
Dialogue: 0,0:03:08.31,0:03:10.71,Default,,0000,0000,0000,,老師你爲什麽要這麽分16呢？
Dialogue: 0,0:03:10.71,0:03:11.84,Default,,0000,0000,0000,,其實我是把16的個位和
Dialogue: 0,0:03:11.84,0:03:15.40,Default,,0000,0000,0000,,十位拆開
Dialogue: 0,0:03:15.40,0:03:16.53,Default,,0000,0000,0000,,這個從右數的第二列
Dialogue: 0,0:03:16.53,0:03:21.74,Default,,0000,0000,0000,,這可不是個1 而是10
Dialogue: 0,0:03:21.75,0:03:25.06,Default,,0000,0000,0000,,16左邊的1是10 所以拆成10+6
Dialogue: 0,0:03:25.06,0:03:27.27,Default,,0000,0000,0000,,這就是這麽拆的原因
Dialogue: 0,0:03:27.28,0:03:29.34,Default,,0000,0000,0000,,好 現在來運算
Dialogue: 0,0:03:29.34,0:03:30.58,Default,,0000,0000,0000,,跟剛剛的方法一樣
Dialogue: 0,0:03:30.59,0:03:32.85,Default,,0000,0000,0000,,9×6--
Dialogue: 0,0:03:32.85,0:03:35.41,Default,,0000,0000,0000,,寫下來
Dialogue: 0,0:03:35.41,0:03:36.77,Default,,0000,0000,0000,,9×6=54
Dialogue: 0,0:03:36.77,0:03:39.54,Default,,0000,0000,0000,,但是這裡不寫54
Dialogue: 0,0:03:39.54,0:03:40.68,Default,,0000,0000,0000,,而是拆成50+4
Dialogue: 0,0:03:40.68,0:03:42.17,Default,,0000,0000,0000,,9×6=50+4
Dialogue: 0,0:03:42.17,0:03:46.73,Default,,0000,0000,0000,,好了 這一列代表個位
Dialogue: 0,0:03:46.74,0:03:48.33,Default,,0000,0000,0000,,畫一條虛線來分開
Dialogue: 0,0:03:48.34,0:03:50.47,Default,,0000,0000,0000,,這邊是個位
Dialogue: 0,0:03:50.47,0:03:52.37,Default,,0000,0000,0000,,只能寫一個4
Dialogue: 0,0:03:52.38,0:03:55.85,Default,,0000,0000,0000,,但還要寫50
Dialogue: 0,0:03:55.85,0:03:57.83,Default,,0000,0000,0000,,要找個地方寫50
Dialogue: 0,0:03:57.84,0:03:59.83,Default,,0000,0000,0000,,慣例是--
Dialogue: 0,0:03:59.83,0:04:01.71,Default,,0000,0000,0000,,至少我學的是這樣--
Dialogue: 0,0:04:01.71,0:04:03.48,Default,,0000,0000,0000,,把50寫在這上邊
Dialogue: 0,0:04:03.48,0:04:06.62,Default,,0000,0000,0000,,當然也可以寫在下面
Dialogue: 0,0:04:06.62,0:04:09.95,Default,,0000,0000,0000,,只要記得
Dialogue: 0,0:04:09.95,0:04:14.85,Default,,0000,0000,0000,,運算時得到十位有個50就行
Dialogue: 0,0:04:14.85,0:04:16.28,Default,,0000,0000,0000,,可以把50寫在這
Dialogue: 0,0:04:16.28,0:04:18.86,Default,,0000,0000,0000,,跟第一個題做的一樣
Dialogue: 0,0:04:18.87,0:04:20.43,Default,,0000,0000,0000,,只寫一個5
Dialogue: 0,0:04:20.43,0:04:22.83,Default,,0000,0000,0000,,剛剛就是只寫了一個5
Dialogue: 0,0:04:22.83,0:04:25.04,Default,,0000,0000,0000,,因爲這個5是在十位的
Dialogue: 0,0:04:25.04,0:04:26.86,Default,,0000,0000,0000,,實際上代表的是50
Dialogue: 0,0:04:26.87,0:04:28.71,Default,,0000,0000,0000,,十位的1就是10
Dialogue: 0,0:04:28.71,0:04:33.85,Default,,0000,0000,0000,,不過現在我要寫50
Dialogue: 0,0:04:33.85,0:04:35.85,Default,,0000,0000,0000,,這樣大家看的比較清楚 就代表50 或者10
Dialogue: 0,0:04:35.85,0:04:39.01,Default,,0000,0000,0000,,然後 9×10=？
Dialogue: 0,0:04:39.01,0:04:40.54,Default,,0000,0000,0000,,9×10
Dialogue: 0,0:04:40.54,0:04:45.62,Default,,0000,0000,0000,,這個我們也記過的
Dialogue: 0,0:04:45.62,0:04:50.55,Default,,0000,0000,0000,,任何數乘以10就是這個數後邊添個0
Dialogue: 0,0:04:50.55,0:04:51.87,Default,,0000,0000,0000,,得90
Dialogue: 0,0:04:51.87,0:04:53.41,Default,,0000,0000,0000,,9×10=90
Dialogue: 0,0:04:53.41,0:04:54.92,Default,,0000,0000,0000,,再加50
Dialogue: 0,0:04:54.92,0:04:57.34,Default,,0000,0000,0000,,90+50
Dialogue: 0,0:04:57.34,0:04:58.88,Default,,0000,0000,0000,,等於多少呢？
Dialogue: 0,0:04:58.88,0:05:00.25,Default,,0000,0000,0000,,是140
Dialogue: 0,0:05:00.25,0:05:02.18,Default,,0000,0000,0000,,9×10=90
Dialogue: 0,0:05:02.19,0:05:06.12,Default,,0000,0000,0000,,90+50=140
Dialogue: 0,0:05:06.12,0:05:07.23,Default,,0000,0000,0000,,爲了跟之前寫的保持一致
Dialogue: 0,0:05:07.24,0:05:09.02,Default,,0000,0000,0000,,可以把140寫成100+40
Dialogue: 0,0:05:09.02,0:05:13.21,Default,,0000,0000,0000,,所以我們要把40放在這裡
Dialogue: 0,0:05:13.21,0:05:16.15,Default,,0000,0000,0000,,百位進1
Dialogue: 0,0:05:16.15,0:05:19.44,Default,,0000,0000,0000,,但是100不知道放在哪
Dialogue: 0,0:05:19.45,0:05:22.00,Default,,0000,0000,0000,,可以寫在這
Dialogue: 0,0:05:22.00,0:05:24.86,Default,,0000,0000,0000,,可以--
Dialogue: 0,0:05:24.87,0:05:35.16,Default,,0000,0000,0000,,也可以寫在這
Dialogue: 0,0:05:35.16,0:05:37.77,Default,,0000,0000,0000,,寫在這裡
Dialogue: 0,0:05:37.77,0:05:39.26,Default,,0000,0000,0000,,很多地方可以寫
Dialogue: 0,0:05:39.26,0:05:40.51,Default,,0000,0000,0000,,這個100
Dialogue: 0,0:05:40.51,0:05:41.80,Default,,0000,0000,0000,,但是最重要的一點不要忘記
Dialogue: 0,0:05:41.80,0:05:42.82,Default,,0000,0000,0000,,這個一百是在百位上
Dialogue: 0,0:05:42.82,0:05:47.13,Default,,0000,0000,0000,,分開線我剛沒畫
Dialogue: 0,0:05:47.14,0:05:49.95,Default,,0000,0000,0000,,這樣再寫一個100
Dialogue: 0,0:05:49.95,0:05:52.84,Default,,0000,0000,0000,,得到是100+40+4
Dialogue: 0,0:05:52.85,0:05:54.82,Default,,0000,0000,0000,,即144
Dialogue: 0,0:05:54.82,0:05:56.00,Default,,0000,0000,0000,,希望大家能聽懂
Dialogue: 0,0:05:56.01,0:05:59.56,Default,,0000,0000,0000,,再來多做幾個題
Dialogue: 0,0:05:59.56,0:06:02.10,Default,,0000,0000,0000,,多看例題是很重要的
Dialogue: 0,0:06:02.11,0:06:04.18,Default,,0000,0000,0000,,計算55×8
Dialogue: 0,0:06:04.18,0:06:07.17,Default,,0000,0000,0000,,55×8
Dialogue: 0,0:06:07.18,0:06:08.18,Default,,0000,0000,0000,,差不多的例題
Dialogue: 0,0:06:08.18,0:06:11.91,Default,,0000,0000,0000,,要用8開始乘
Dialogue: 0,0:06:11.92,0:06:14.71,Default,,0000,0000,0000,,8×5
Dialogue: 0,0:06:14.71,0:06:18.83,Default,,0000,0000,0000,,我先寫下來
Dialogue: 0,0:06:18.83,0:06:27.26,Default,,0000,0000,0000,,8×5=40
Dialogue: 0,0:06:27.27,0:06:28.95,Default,,0000,0000,0000,,把0寫在這
Dialogue: 0,0:06:28.95,0:06:31.24,Default,,0000,0000,0000,,進位4
Dialogue: 0,0:06:31.25,0:06:33.05,Default,,0000,0000,0000,,然後又是8×5
Dialogue: 0,0:06:33.05,0:06:36.55,Default,,0000,0000,0000,,還是40
Dialogue: 0,0:06:36.55,0:06:40.47,Default,,0000,0000,0000,,不過再加上進位4 是44
Dialogue: 0,0:06:40.47,0:06:43.59,Default,,0000,0000,0000,,代表的是440
Dialogue: 0,0:06:43.60,0:06:46.54,Default,,0000,0000,0000,,你可以像我上個題一樣
Dialogue: 0,0:06:46.55,0:06:49.75,Default,,0000,0000,0000,,把55拆成50+5再分別乘以8
Dialogue: 0,0:06:49.75,0:06:52.04,Default,,0000,0000,0000,,不過做的題多了
Dialogue: 0,0:06:52.04,0:06:53.48,Default,,0000,0000,0000,,應該大家會習慣這麽運算的
Dialogue: 0,0:06:53.49,0:06:55.58,Default,,0000,0000,0000,,再做一個--
Dialogue: 0,0:06:55.58,0:06:57.96,Default,,0000,0000,0000,,換個顏色
Dialogue: 0,0:06:57.97,0:07:01.79,Default,,0000,0000,0000,,淺紅色
Dialogue: 0,0:07:01.80,0:07:02.56,Default,,0000,0000,0000,,用78乘以--
Dialogue: 0,0:07:02.56,0:07:06.18,Default,,0000,0000,0000,,乘以7
Dialogue: 0,0:07:06.18,0:07:08.19,Default,,0000,0000,0000,,8×7
Dialogue: 0,0:07:08.19,0:07:09.68,Default,,0000,0000,0000,,8×7=56
Dialogue: 0,0:07:09.68,0:07:13.81,Default,,0000,0000,0000,,寫下來--這又是一個新題
Dialogue: 0,0:07:13.82,0:07:16.80,Default,,0000,0000,0000,,8×7=56
Dialogue: 0,0:07:16.80,0:07:25.86,Default,,0000,0000,0000,,把6寫在下邊 進位5寫在上邊
Dialogue: 0,0:07:25.86,0:07:27.60,Default,,0000,0000,0000,,7×7=49
Dialogue: 0,0:07:27.60,0:07:31.39,Default,,0000,0000,0000,,7乘以7得49
Dialogue: 0,0:07:31.39,0:07:33.07,Default,,0000,0000,0000,,還要加上邊的5
Dialogue: 0,0:07:33.08,0:07:35.29,Default,,0000,0000,0000,,再加上5
Dialogue: 0,0:07:35.29,0:07:36.85,Default,,0000,0000,0000,,49+5=？
Dialogue: 0,0:07:36.85,0:07:38.36,Default,,0000,0000,0000,,是54
Dialogue: 0,0:07:38.37,0:07:40.33,Default,,0000,0000,0000,,7×7=49
Dialogue: 0,0:07:40.33,0:07:42.95,Default,,0000,0000,0000,,49+5=54
Dialogue: 0,0:07:42.95,0:07:46.24,Default,,0000,0000,0000,,得546
Dialogue: 0,0:07:46.25,0:07:47.54,Default,,0000,0000,0000,,不久前你可能還覺得
Dialogue: 0,0:07:47.54,0:07:49.12,Default,,0000,0000,0000,,光用1-12的乘法表
Dialogue: 0,0:07:49.12,0:07:50.15,Default,,0000,0000,0000,,肯定求不出78的乘法表
Dialogue: 0,0:07:50.16,0:07:51.94,Default,,0000,0000,0000,,但大家可以看到過程其實非常簡單
Dialogue: 0,0:07:51.94,0:07:54.51,Default,,0000,0000,0000,,再多做幾個
Dialogue: 0,0:07:54.52,0:07:57.76,Default,,0000,0000,0000,,一直算到不能再算爲止
Dialogue: 0,0:07:57.76,0:07:59.14,Default,,0000,0000,0000,,算到精疲力竭爲止
Dialogue: 0,0:07:59.14,0:08:04.15,Default,,0000,0000,0000,,89×3
Dialogue: 0,0:08:04.15,0:08:06.69,Default,,0000,0000,0000,,89×3=？
Dialogue: 0,0:08:06.69,0:08:09.18,Default,,0000,0000,0000,,3×9=27
Dialogue: 0,0:08:09.18,0:08:20.37,Default,,0000,0000,0000,,7寫在個位
Dialogue: 0,0:08:20.37,0:08:23.18,Default,,0000,0000,0000,,向十位進位2
Dialogue: 0,0:08:23.18,0:08:24.71,Default,,0000,0000,0000,,因爲27=20+7
Dialogue: 0,0:08:24.71,0:08:27.99,Default,,0000,0000,0000,,兩個10就是20
Dialogue: 0,0:08:27.99,0:08:29.56,Default,,0000,0000,0000,,加7是27
Dialogue: 0,0:08:29.56,0:08:32.48,Default,,0000,0000,0000,,然後3×8=24
Dialogue: 0,0:08:32.48,0:08:34.45,Default,,0000,0000,0000,,3×8=24
Dialogue: 0,0:08:34.45,0:08:35.87,Default,,0000,0000,0000,,上邊還有一個2的進位
Dialogue: 0,0:08:35.87,0:08:37.87,Default,,0000,0000,0000,,還要再加2
Dialogue: 0,0:08:37.88,0:08:39.43,Default,,0000,0000,0000,,得26
Dialogue: 0,0:08:39.44,0:08:41.67,Default,,0000,0000,0000,,3×8=24
Dialogue: 0,0:08:41.67,0:08:45.08,Default,,0000,0000,0000,,24+2=26
Dialogue: 0,0:08:45.09,0:08:48.64,Default,,0000,0000,0000,,結果是267
Dialogue: 0,0:08:48.64,0:08:49.82,Default,,0000,0000,0000,,再做一個
Dialogue: 0,0:08:49.83,0:08:52.18,Default,,0000,0000,0000,,不過我要加難度了
Dialogue: 0,0:08:52.18,0:08:54.40,Default,,0000,0000,0000,,在你覺得
Dialogue: 0,0:08:54.40,0:08:56.74,Default,,0000,0000,0000,,這些都會做的時候
Dialogue: 0,0:08:56.74,0:08:58.53,Default,,0000,0000,0000,,我再出一個能難到你的！
Dialogue: 0,0:08:58.53,0:09:02.18,Default,,0000,0000,0000,,239×6
Dialogue: 0,0:09:02.18,0:09:03.68,Default,,0000,0000,0000,,本來是要做
Dialogue: 0,0:09:03.68,0:09:10.16,Default,,0000,0000,0000,,兩位數乘一位數的影片的
Dialogue: 0,0:09:10.16,0:09:10.90,Default,,0000,0000,0000,,不過這題也是告訴大家
Dialogue: 0,0:09:10.90,0:09:13.79,Default,,0000,0000,0000,,不管是幾位數去乘一個一位數
Dialogue: 0,0:09:13.79,0:09:14.64,Default,,0000,0000,0000,,你都是可以做的
Dialogue: 0,0:09:14.64,0:09:18.36,Default,,0000,0000,0000,,步驟大同小異
Dialogue: 0,0:09:18.36,0:09:19.97,Default,,0000,0000,0000,,大家可以猜一猜這個要怎麽做
Dialogue: 0,0:09:19.97,0:09:21.40,Default,,0000,0000,0000,,6×9=？
Dialogue: 0,0:09:21.40,0:09:24.49,Default,,0000,0000,0000,,在這裡寫
Dialogue: 0,0:09:24.50,0:09:27.83,Default,,0000,0000,0000,,6×9
Dialogue: 0,0:09:27.83,0:09:32.20,Default,,0000,0000,0000,,這個之前算過了
Dialogue: 0,0:09:32.20,0:09:34.14,Default,,0000,0000,0000,,54
Dialogue: 0,0:09:34.14,0:09:36.39,Default,,0000,0000,0000,,把4寫在這
Dialogue: 0,0:09:36.40,0:09:38.79,Default,,0000,0000,0000,,5放在十位
Dialogue: 0,0:09:38.80,0:09:41.49,Default,,0000,0000,0000,,因爲這個54中的5就是5個10
Dialogue: 0,0:09:41.49,0:09:43.80,Default,,0000,0000,0000,,好
Dialogue: 0,0:09:43.80,0:09:46.38,Default,,0000,0000,0000,,然後是6×3
Dialogue: 0,0:09:46.38,0:09:49.23,Default,,0000,0000,0000,,6×3
Dialogue: 0,0:09:49.23,0:09:52.61,Default,,0000,0000,0000,,得18
Dialogue: 0,0:09:52.61,0:09:57.35,Default,,0000,0000,0000,,上邊還有一個5
Dialogue: 0,0:09:57.35,0:10:01.14,Default,,0000,0000,0000,,還要加5
Dialogue: 0,0:10:01.14,0:10:02.29,Default,,0000,0000,0000,,18+5=？
Dialogue: 0,0:10:02.30,0:10:03.49,Default,,0000,0000,0000,,6×3=18 18+5=23
Dialogue: 0,0:10:03.50,0:10:06.71,Default,,0000,0000,0000,,澄清一點
Dialogue: 0,0:10:06.71,0:10:08.32,Default,,0000,0000,0000,,並不是用6×3+5
Dialogue: 0,0:10:08.32,0:10:09.77,Default,,0000,0000,0000,,你看
Dialogue: 0,0:10:09.77,0:10:12.25,Default,,0000,0000,0000,,在這個問題裏
Dialogue: 0,0:10:12.25,0:10:15.02,Default,,0000,0000,0000,,3其實是30
Dialogue: 0,0:10:15.02,0:10:17.36,Default,,0000,0000,0000,,只不過寫的是3
Dialogue: 0,0:10:17.37,0:10:18.62,Default,,0000,0000,0000,,但這其實是6×30+50
Dialogue: 0,0:10:18.62,0:10:20.12,Default,,0000,0000,0000,,因爲39的3是3個10 或者是30
Dialogue: 0,0:10:20.13,0:10:21.83,Default,,0000,0000,0000,,那麽
Dialogue: 0,0:10:21.84,0:10:23.50,Default,,0000,0000,0000,,雖然這裡說6×3=18
Dialogue: 0,0:10:23.50,0:10:25.50,Default,,0000,0000,0000,,18+5=23
Dialogue: 0,0:10:25.50,0:10:26.74,Default,,0000,0000,0000,,實際得到的其實是230
Dialogue: 0,0:10:26.74,0:10:29.09,Default,,0000,0000,0000,,把3放在十位
Dialogue: 0,0:10:29.09,0:10:35.21,Default,,0000,0000,0000,,我換個顏色來寫
Dialogue: 0,0:10:35.21,0:10:38.20,Default,,0000,0000,0000,,用個跟上邊不一樣的
Dialogue: 0,0:10:38.20,0:10:40.98,Default,,0000,0000,0000,,結果是23
Dialogue: 0,0:10:40.98,0:10:42.87,Default,,0000,0000,0000,,把3放在十位
Dialogue: 0,0:10:42.87,0:10:46.62,Default,,0000,0000,0000,,向百位進2 寫上邊
Dialogue: 0,0:10:46.62,0:10:53.06,Default,,0000,0000,0000,,差不多就做完了 再乘最後一次
Dialogue: 0,0:10:53.06,0:10:53.81,Default,,0000,0000,0000,,6×2
Dialogue: 0,0:10:53.81,0:10:56.21,Default,,0000,0000,0000,,這個很簡單
Dialogue: 0,0:10:56.22,0:10:58.32,Default,,0000,0000,0000,,得12
Dialogue: 0,0:10:58.32,0:10:59.90,Default,,0000,0000,0000,,但是上邊還有進位2
Dialogue: 0,0:10:59.90,0:11:01.26,Default,,0000,0000,0000,,所以還要再加2
Dialogue: 0,0:11:01.26,0:11:03.38,Default,,0000,0000,0000,,+2
Dialogue: 0,0:11:03.39,0:11:06.20,Default,,0000,0000,0000,,等於什麽呢？
Dialogue: 0,0:11:06.20,0:11:08.13,Default,,0000,0000,0000,,12+2=14
Dialogue: 0,0:11:08.14,0:11:10.12,Default,,0000,0000,0000,,寫4
Dialogue: 0,0:11:10.13,0:11:13.96,Default,,0000,0000,0000,,6×2=12
Dialogue: 0,0:11:13.97,0:11:18.68,Default,,0000,0000,0000,,12+2=14
Dialogue: 0,0:11:18.68,0:11:20.84,Default,,0000,0000,0000,,把4寫在下邊
Dialogue: 0,0:11:20.84,0:11:23.25,Default,,0000,0000,0000,,如果這裡還有更高位的話就寫在上邊
Dialogue: 0,0:11:23.27,0:11:27.14,Default,,0000,0000,0000,,但是沒有了
Dialogue: 0,0:11:27.14,0:11:34.37,Default,,0000,0000,0000,,所以直接寫在這就可以了
Dialogue: 0,0:11:34.37,0:11:36.35,Default,,0000,0000,0000,,239×6
Dialogue: 0,0:11:36.35,0:11:38.96,Default,,0000,0000,0000,,=1434
Dialogue: 0,0:11:38.96,0:11:40.71,Default,,0000,0000,0000,,再做一個
Dialogue: 0,0:11:40.71,0:11:44.16,Default,,0000,0000,0000,,需要清一些空間出來
Dialogue: 0,0:11:44.16,0:11:47.35,Default,,0000,0000,0000,,既然已經增加難度了
Dialogue: 0,0:11:47.36,0:11:50.46,Default,,0000,0000,0000,,下面來做一個四位數的吧
Dialogue: 0,0:11:50.46,0:11:52.03,Default,,0000,0000,0000,,7362×--
Dialogue: 0,0:11:52.03,0:11:54.55,Default,,0000,0000,0000,,難點的--9
Dialogue: 0,0:11:54.55,0:11:56.87,Default,,0000,0000,0000,,9×2=？
Dialogue: 0,0:11:56.87,0:12:00.49,Default,,0000,0000,0000,,我就不再寫在旁邊了
Dialogue: 0,0:12:00.49,0:12:05.02,Default,,0000,0000,0000,,大家應該已經明白這個套路了
Dialogue: 0,0:12:05.02,0:12:07.20,Default,,0000,0000,0000,,9×2=？