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$第7课时体积单位间的进率 、1.101立方分米10101010001000 10002.1701.2687.27000.15 500028000.0320.00930705.47 200 二、1.×2.√3.×4.×5.× 三、1.C2.A3.C4.B 四、1.6×6×6=216(立方厘米)216×50=10800 立方厘米=10.8立方分米2.5米=50分米 50×38×4=7600(立方分米)7600立方分米 =7.6立方米=7.6方3.50×25×4=5000 (立方米)1立方米的水重1吨,则5000立方 米的水重5000吨。4.分析:锯成三段需要2 次,1次增加2个面,2次就增加了4个面。 2米=20分米24÷4=6(平方分米)V=Sh= 6×20=120(立方分米