写出下面各数中“2”的意义:20.04,5.42,0.25,0.672

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写出下面各数中“2”的意义:20.04,5.42,0.25,0.672写出下面各数中“2”的意义:20.04,5.42,0.25,0.672写出下面各数中“2”的意义:20.04,5.42,0.25,

写出下面各数中“2”的意义:20.04,5.42,0.25,0.672
写出下面各数中“2”的意义:20.04,5.42,0.25,0.672

写出下面各数中“2”的意义:20.04,5.42,0.25,0.672
2个10…2个0.01…2个0.1…2个0.001

20.04的2是2个10,5.42的2是2个0.01,0.25的2是2个0.1,0.672的2是2个0.001