數學分數的簡單計算PPT課件.ppt

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'數學分數的簡單計算PPT課件.ppt'
分數的簡單計算小學數學第五冊一、  復習。 口答下面各題。(1) 里面有( )個 。 里面有( )個 。(2) 3個( )是 。 5個( )是 。(3)( )個 是 。( )個 是 。 (4) 里有( )個( ) 。 4 個 是( ) 。(5) 1 = = = = = 。451719231851836515熊媽媽買了一個大蛋糕,熊哥哥吃了這個蛋糕的 ,熊弟弟吃了蛋糕的 。252515+=35熊哥哥和熊弟弟一共吃了蛋糕的幾分之幾?2個  加上1個  是3個 ,就是 15151535小紅我吃了這個西瓜的28小麗我吃了這個西瓜的18小紅吃了西瓜的 ,小麗吃了西瓜的 ,他們一共吃了這個西瓜的幾分之幾?28182 個 加 1 個 是 3 個 , 就 是 。 181838182818+=28+138=1、小紅吃了西瓜的 ,小麗吃了西瓜的的,他們一共吃了這個西瓜的幾分之幾?1828+1656+care.qm120.com/3c6b/4adq/10315.htmlcare.qm120.com/3c6b/4adq/10285.htmlcare.qm120.com/3c6b/4adq/10284.htmlcare.qm120.com/3c6b/4adq/10283.htmlcare.qm120.com/3c6b/4adq/10282.htmlcare.qm120.com/3c6b/4adq/10281.htmlcare.qm120.com/3c6b/4adq/10280.htmlcare.qm120.com/3c6b/4adq/10279.htmlcare.qm120.com/3c6b/4adq/10278.htmlcare.qm120.com/3c6b/4adq/10277.htmlcare.qm120.com/3c6b/4adq/10276.htmlcare.qm120.com/3c6b/4adq/10272.htmlcare.qm120.com/3c6b/4adq/10271.htmlcare.qm120.com/3c6b/4adq/10270.htmlcare.qm120.com/3c6b/4adq/10269.htmlcare.qm120.com/3c6b/4adq/10268.htmlcare.qm120.com/3c6b/4adq/10267.htmlcare.qm120.com/3c6b/4adq/10266.htmlcare.qm120.com/3c6b/4adq/10265.htmlcare.qm120.com/3c6b/4adq/10264.htmlcare.qm120.com/3c6b/4adq/10263.htmlcare.qm120.com/3c6b/4adq/9967.htmlcare.qm120.com/3c6b/4adq/9966.htmlcare.qm120.com/3c6b/4adq/9965.htmlcare.qm120.com/3c6b/4adq/9964.htmlcare.qm120.com/3c6b/4adq/9963.htmlcare.qm120.com/3c6b/4adq/9962.htmlcare.qm120.com/3c6b/4adq/9961.htmlcare.qm120.com/3c6b/4adq/9960.htmlcare.qm120.com/3c6b/4adq/9959.htmlcare.qm120.com/3c6b/4adq/9958.htmlcare.qm120.com/3c6b/4adq/9957.htmlcare.qm120.com/3c6b/4adq/9956.htmlcare.qm120.com/3c6b/4adq/9955.htmlcare.qm120.com/3c6b/4adq/9954.htmlcare.qm120.com/3c6b/4adq/9953.htmlcare.qm120.com/3c6b/4adq/9952.htmlcare.qm120.com/3c6b/4adq/9951.htmlcare.qm120.com/3c6b/4adq/9950.htmlcare.qm120.com/3c6b/4adq/9949.htmlcare.qm120.com/3c6b/4adq/9948.htmlcare.qm120.com/3c6b/4adq/9947.htmlcare.qm120.com/3c6b/4adq/9946.htmlcare.qm120.com/3c6b/4adq/9945.htmlcare.qm120.com/3c6b/4adq/9944.htmlcare.qm120.com/3c6b/4adq/9943.htmlcare.qm120.com/3c6b/4adq/9942.htmlcare.qm120.com/3c6b/4adq/9941.htmlcare.qm120.com/3c6b/4adq/9940.htmlcare.qm120.com/3c6b/4adq/9939.htmlcare.qm120.com/3c6b/4adq/9938.htmlcare.qm120.com/3c6b/4adq/9906.htmlcare.qm120.com/3c6b/4adq/9905.htmlcare.qm120.com/3c6b/4adq/9904.htmlcare.qm120.com/3c6b/4adq/9903.htmlcare.qm120.com/3c6b/4adq/9902.htmlcare.qm120.com/3c6b/4adq/9901.htmlcare.qm120.com/3c6b/4adq/9900.htmlcare.qm120.com/3c6b/4adq/9899.htmlcare.qm120.com/3c6b/4adq/9898.htmlcare.qm120.com/3c6b/4adq/9897.htmlcare.qm120.com/3c6b/4adq/9872.htmlcare.qm120.com/3c6b/4adq/9871.htmlcare.qm120.com/3c6b/4adq/9870.htmlcare.qm120.com/3c6b/4adq/9869.htmlcare.qm120.com/3c6b/4adq/9868.htmlcare.qm120.com/3c6b/4adq/9867.htmlcare.qm120.com/3c6b/4adq/9866.htmlcare.qm120.com/3c6b/4adq/9865.htmlcare.qm120.com/3c6b/4adq/9864.htmlcare.qm120.com/3c6b/4adq/9863.htmlcare.qm120.com/3c6b/4adq/9862.htmlcare.qm120.com/3c6b/4adq/9861.htmlcare.qm120.com/3c6b/4adq/9860.htmlcare.qm120.com/3c6b/4adq/9859.htmlcare.qm120.com/3c6b/4adq/9858.htmlcare.qm120.com/3c6b/4adq/9857.htmlcare.qm120.com/3c6b/4adq/9856.htmlcare.qm120.com/3c6b/4adq/9855.htmlcare.qm120.com/3c6b/4adq/9854.htmlcare.qm120.com/3c6b/4adq/9853.htmlcare.qm120.com/3c6b/4adq/8297.htmlcare.qm120.com/3c6b/4adq/8296.htmlcare.qm120.com/3c6b/4adq/8295.htmlcare.qm120.com/3c6b/4adq/8294.htmlcare.qm120.com/3c6b/4adq/8293.htmlcare.qm120.com/3c6b/4adq/8292.htmlcare.qm120.com/3c6b/4adq/8291.htmlcare.qm120.com/3c6b/4adq/8290.htmlcare.qm120.com/3c6b/4adq/8289.htmlcare.qm120.com/3c6b/4adq/8288.htmlcare.qm120.com/3c6b/4adq/8287.htmlcare.qm120.com/3c6b/4adq/8286.htmlcare.qm120.com/3c6b/4adq/8285.htmlcare.qm120.com/3c6b/4adq/8284.htmlcare.qm120.com/3c6b/4adq/8283.htmlcare.qm120.com/3c6b/4adq/8282.htmlcare.qm120.com/3c6b/4adq/8281.htmlcare.qm120.com/3c6b/4adq/8280.htmlcare.qm120.com/3c6b/4adq/8279.html+1656++1656++1656+=66= 12515+=351656+=66= 1仔細觀察,你發現了什么?看誰算得又對又快。2737+=574929+=691535+=452636+=561838+=481767+=77=115熊媽媽買了一個大蛋糕,熊哥哥吃了這個蛋糕的 ,熊弟弟吃了蛋糕的 。252515-=1515熊哥比熊弟多吃幾分之幾?366161616332515-=155626-=36仔細觀察,你發現了什么?看誰算得又對又快。4737-=178969-=293828-=18 710 310-= 41014-=1?6656-=1614-1=?1為什么可以看作 ?4414-1=4414-=34“1”還可以看作幾分之幾 ?100怎樣計算分母相同的分數的加減法?計算同分母分數加(減)法,分母不變,分子相加或相減。15熊媽媽做了一個蛋糕,熊哥哥吃了這個蛋糕的 ,熊弟弟吃了蛋糕的 。25還剩這個蛋糕的幾分之幾?書99練一練:310410+=7108929-=69147-=372989?2、?4713、1、310410?5727-=+=491989=1-2858=+8989=-46=-1591904、計算:3778266、在( )里填上合適的數。( )+ = ( )— = —( )= ( )+ = 1 + = ( ) + ( )= 1 2111115 91610271232 ( )+( )=67考考你
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