三年级数学下册五《面积》面积单位的换算课堂作业北师大版.doc

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1面积单位的换算备选习题1填空。200平方厘米=( )平方分米4000平方分米=( )平方米7平方米=( )平方分米1200平方分米=( )平方米600平方厘米=( )平方分米800平方分米=( )平方米9平方米=( )平方分米=( )平方厘米2一块方砖的边长是 8分米,它的面积是多少平方分米?合多少平方厘米?3一间教室长 15米,宽 12米,它的面积是多少?如果用面积是 9平方分米的方砖铺地,需要多少块? 答案:1. 2 40 700 12 6 8 900 900002. 88=64(平方分米) 合 6400平方厘米3. 1512 =180(平方米)180 平方米=18000 平方分米180009=2000(块)

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