五年级数学下册3长方体和正方体长方体和正方体的体积补充习题3新人教版.doc

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1长方体和正方体长方体和正方体的体积一个舞蹈教室,铺设了 1600 块长 50cm,宽 10 cm,厚 3 cm 的木质地板。这个舞蹈教室的面积是多少平方米?铺设地板用了多少立方米木材?答案提示:50 cm0.5m10 cm0.1m3 cm0.03m0.50.1160080(m 2)0.50.10.0316002.4(m 3)答:这个舞蹈教室的面积是(80)平方米。铺设地板用了(2.4)立方米木材。解题思路:注意区分面积和体积的求法。2

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