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三年级数学下册四两位数乘两位数第1课时口算乘法习题课件1新人教版.ppt

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68,48,28,40,20,68,680,400,280,400,280,680,68,68,整十,整十,一位,加,整百,整十,加,1,4,80,12,92,100,40,6,600,240,840,52,50,520,500,64,960,960,810,96,84,750,910,(元) 答:买张要元钱.,(元) (元) 答:买 把要 元钱, 元够买把指纹锁.,2,48,16,6,120,8,160,6,

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