個位擺出的數(shù)十位

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1、單擊此處編輯母版標(biāo)題樣式,,單擊此處編輯母版文本樣式,,第二級,,第三級,,第四級,,第五級,,,*,樂成鎮(zhèn)第一小學(xué),,執(zhí)教：蔡賽景,,擺一擺 想一想,,十位,個位,現(xiàn)在我表示幾？,,十位,個位,現(xiàn)在我表示幾？,,十 位,個 位,數(shù),,,,,,,,,1,,1,個 可以擺成,:,,十 位,個 位,數(shù),,,,,,,,,1,10,1,個 可以擺成,:,,請小朋友注意活動的要求:,1,、只用,4,顆棋子，在數(shù)位表上擺數(shù)。,,2,、擺出一個數(shù)讀出來，并寫在本子上。,,3,、完成后,,,與同桌說說你變了幾個數(shù),?,你是怎么擺的，比一比誰擺的數(shù)多,,,擺的方

2、法最好。,,十 位,個 位,擺出的數(shù),,,,,,,,,,,,,,,,4,13,22,31,40,4,個 可以擺成：,,棋子個數(shù),數(shù)的個數(shù),擺出的數(shù),,2,,,,,,,,,5,,,,,,,,,,,,,,,,,1,2,3,4,5,6,,1,、,10,2,、,11,、,20,3,、,12,、,21,、,30,4,、,13,、,22,、,31,、,40,5,、,14,、,23,、,32,、,41,、,50,6,、,15,、,24,、,33,、,42,、,51,、,60,3,,4,6,7,,棋子個數(shù),數(shù)的個數(shù),擺出的數(shù),,,,,,,,,,,,,,,,,,,,,,,,,,,,1,2,3,4,5

3、,6,7,8,9,2,3,4,5,6,7,8,9,10,1,、,10,2,、,11,、,20,3,、,12,、,21,、,30,4,、,13,、,22,、,31,、,40,5,、,14,、,23,、,32,、,41,、,50,6,、,15,、,24,、,33,、,42,、,51,、,60,7,、,16,、,25,、,34,、,43,、,52,、,61,、,70,8,、,17,、,26,、,35,、,44,、,53,、,62,、,71,、,80,9,、,18,、,27,、,36,、,45,、,54,、,63,、,72,、,81,、,90,,棋子顆數(shù),擺出數(shù)的個數(shù),,,,擺,出的數(shù),1,2,,1,

4、、,10,2,3,,2,、,11,、,20,3,4,,3,、,12,、,21,、,30,4,5,,4,、,13,、,22,、,31,、,40,5,6,,5,、,14,、,23,、,32,、,41,、,50,6,7,,6,、,15,、,24,、,33,、,42,、,51,、,60,7,8,,7,、,16,、,25,、,34,、,43,、,52,、,61,、,70,8,9,,8,、,17,、,26,、,35,、,44,、,53,、,62,、,71,、,80,9,10,9,、,18,、,27,、,36,、,45,、,54,、,63,、,72,、,81,、,90,,,發(fā)現(xiàn),:,我們今天只用了,9,顆棋

5、子一共擺（ ）個不同的數(shù),?,,一共有,54,個數(shù)字。,,6,顆,棋子可以擺：找出哪個是錯誤的呢,??,6,、,24,、,15,、,34,、,42,、,,51,、,33,、,60,34,7,,猜一猜,:,蔡老師今年的年齡可以用,5,顆棋子擺出的數(shù),,,你猜我可能是幾歲？,,我今年,32,歲。,,棋子個數(shù),數(shù)的個數(shù),擺出的數(shù),1,2,,2,3,,3,,,,,,,,,,,,,,,,,,,,,4,5,6,7,8,9,4,5,6,7,8,9,10,1,、,10,2,、,11,、,20,3,、,12,、,21,、,30,4,、,13,、,22,、,31,、,40,5,、,14,、,23

6、,、,32,、,41,、,50,6,、,15,、,24,、,33,、,42,、,51,、,60,7,、,16,、,25,、,34,、,43,、,52,、,61,、,70,8,、,17,、,26,、,35,、,44,、,53,、,62,、,71,、,80,9,、,18,、,27,、,36,、,45,、,54,、,63,、,72,、,81,、,90,,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,96,97,98,99,,