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s the two factors. 兩個(gè)因數(shù)共有幾位小數(shù) , 積就有幾位小數(shù) . New knowledge Here is Xiao Ming’s room. What information do you know from the picture? meters meters Xiao Ming’s room New knowledge The length is meters The width is meters Can you ask some maths questions? What’ the area of this room? Xiao Ming’s room meters meters New knowledge = Wh