青岛版三年级数学上册课件

1、青岛版三年级数学上册青岛版三年级数学上册青岛版三年级数学上册实验小学实验小学青岛版三年级数学上册青岛版三年级数学上册胎儿时期头长占整个身长的胎儿时期头长占整个身长的( )?21婴儿时期头长占整个身长的婴儿时期头长占整个身长的( )? 41青岛版三年级数学上册83( )( )85( )( )上身的长约占整个身长上身的长约占整个身长83( )( )青岛版三年级数学上册8183 里面有里面有3个个 。 838185 里面有里面有5个个 。 8581青岛版三年级数学上册83( )( )84( )( )成人的躯干和下肢共占身长的几分之几？成人的躯干和下肢共占身长的几分之几？怎样列算式？怎样列算式？ 你能

2、提出什么问题？你能提出什么问题？ 青岛版三年级数学上册83 是是 （ ）个）个 ， 是（是（ ）个）个81848134 3个个 与与 4 个个 合起来是（合起来是（ ）个）个 就是（就是（ ）。）。81818178783 + 84你会计算吗？你会计算吗？ 青岛版三年级数学上册83 + = =8784843 分子相加分子相加 分母不变分母不变同分母分数相加怎样计算？同分母分数相加怎样计算？ 同分母分数同分母分数 相相 加，加，分母不变，把分子相加。分母不变，把分子相加。青岛版三年级数学上册84 - 83口述计算过程口述计算过程 84 是是 （ ）个）个 ， 是（是（ ）个）个8183814314

3、个个 减去减去3个个 就是（就是（ ）个）个 ，就，就是是81818181青岛版三年级数学上册84 - 8183834 = = 分子相减分子相减 分母不变分母不变同分母分数相减怎样计算？同分母分数相减怎样计算？ 同分母分数同分母分数 相相 减，减，分母不变，把分子相减。分母不变，把分子相减。青岛版三年级数学上册怎样计算同分母分数加减法？怎样计算同分母分数加减法？ 同分母分数同分母分数 相相 加加 减，减，分母不变，把分子相加减。分母不变，把分子相加减。青岛版三年级数学上册51 + 5352521 = = 54 - 5351514 = = 青岛版三年级数学上册我涂了我涂了( )( )62我涂了我

4、涂了64( )( )一共涂了一共涂了 ,( )( )66也就是（也就是（ ）1（ ）+（ ）=（ ）=（ ）6264166青岛版三年级数学上册 1还可以写成还可以写成 ( )( )？青岛版三年级数学上册青岛版三年级数学上册3131 + = 324241 - = 41104106 + = 1010=151 1 - 55 - 5154 = = 青岛版三年级数学上册1.判断对错。判断对错。 （1）同分母分数相加减，分）同分母分数相加减，分母不变，把分子相加减。（母不变，把分子相加减。（ ） （2） + = = 。（。（ ）72747742146青岛版三年级数学上册青岛版三年级数学上册 你还能说出得数

5、是你还能说出得数是 的算式？的算式？97青岛版三年级数学上册青岛版三年级数学上册 同分母分数同分母分数加减加减法法 分母分母不变不变 分子相分子相加减加减青岛版三年级数学上册青岛版三年级数学上册E2B+x(u%rZoWlThQeMbJ8G4D1A-w*t!qYnVjSgPdLaI6F3C0y)v&s#pXlUiRfNcK9H5E2A+x(u$rZoWkThPeMbJ7G4D1z-w*t!qYmVjSgOdLaI6F3B0y)v%s#pXlUiQfNcK8H5E2A+x*u$rZnWkThPeMaJ7G4C1z-w&t!pYmVjRgOdL9I6E3B0y(v%s#oXlUiQfNbK8H5D2

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7、QeNbJ8G4D1A-w*t$qYnVjSgPdLaI7F3C0y)v&s#pXmUiRfNcK9H5E2B+x(u$rZoWkThQeMbJ7G4D1z-w*t!qYnVjSgOdLaI6F3C0y)v%s#pXlUiRfNcK8H5E2A+x(u$rZnWkThPeMbJ7G4C1z-w&t!qYmVjRgOdL9I6F3B0y(v%s#oXlUiQfNcK8H5D2A+x*u$rZnWkShPeMaJ7G4C1z)w&t!pYmVjRgOcL9I6E3B0y(v%r#oXlTiQfNbK8G5D2A-x*u$qZnVkShPdMaJ7F4C0z)w&s!pYmUjRgOcL9H6E3B

8、+y(v%r#oWlTiQeNbK8G5D1A-x*t$qZnVkSgPdMaI7F4C0z)v&s!pXmUjRfOcK9H6E2B+y(u%rZoWlThQeNbJ8G5D1A-w*t$qYnVkSgPdLaI7F3C0z)v&s#pXmUiRfOcK9H5E2B+x(u%rZoWkThQeMbJ8G4D1z-w*t!qYnVjSgOdLaI6F3C0y)v%s#pXlUiRfNcK9H5E2A+x(u$rZoWkThPeMbJ7G4D1z-w&t!qYmVjSgOdL9I6F3B0y)v%s#oXlUiQfNcK8H5D2A+x*u$rZnWkShPeMaJ7G4C1z-w&t!pYmV

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10、)v&s!pXmUiRfOcK9H6E2B+x(u%rZoWlThQeMbJ8G4D1A-w*t!qYnVjSgPdLaI6F3C0y)v&s#pXlUiRfNcK9H5E2B+x(u$rZoWkThQeMbJ7G4D1z-w*t!qYmVjSgOdLaI6F3B0y)v%s#pXlUiQfNcK8H5E2A+x*u$rZnWkThPeMaJ7G4C1z-w&t!qYmVjRgOdL9I6F3B0y(v%s#oXlUiQfNbK8H5D2A+x*u$qZnWkShPeMaJ7F4C1z)w&t!pYmUjRgOcL9I6E3B+y(v%r#oXlTiQfNbK8G5D2A-x*u$qZnVkS

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16、%r#oXlTiQfNbK8G5D2A-x*u$qZnVkShPdMaJ7F4C0z)w&s!pYmUjRfOcL9H6E3B+y(v%r#oWlTiQeNbK8G5D1A-x*t$qZnVkSgPdMaI7F4C0z)v&s!pXmUjRfOcK9H6E2B+y(u%rZoWlThQeNbJ8G1z)w&s!pYmUjRgOcL9H6E3B+y(v%r#oWlTiQeNbK8G5D1A-x*t$qZnVkSgPdMaI7F4C0z)v&s!pXmUjRfOcK9H6E2B+y(u%rZoWlThQeNbJ8G5D1A-w*t$qYnVkSgPdLaI7F3C0z)v&s#pXmUiRfOcK

17、9H5E2B+x(u%rZoWkThQeMbJ8G4D1z-w*t!qYnVjSgOdLaI6F3C0y)v&s#pXlUiRfNcK9H5E2A+x(u$rZoWkThPeMbJ7G4D1z-w&t!qYmVjSgOdL9I6F3B0y)v%s#oXlUiQfNcK8H5D2A+x*u$rZnWkShPeMaJ7G4C1z-w&t!pYmVjRgOdL9I6E3Bu$rZoWkThPeMbJ7G4D1z-w&t!qYmVjSgOdL9I6F3B0y)v%s#oXlUiQfNcK8H5E2A+x*u$rZnWkThPeMaJ7G4C1z-w&t!pYmVjRgOdL9I6E3B0y(v%s#o

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