| A．20.13 | B．10.23 | C．12.03 | D．13.02 |
| A．0.087＞0.807＞0.8＞0.78 | B．0.807＞0.8＞0.78＞0.087 | C．0.807＞0.8＞0.087＞0.78 |
| A．大小相等，意义相同 | B．大小相等，意义不同 | C．大小不等，意义相同 |
| A．0.04 | B．0.40 | C．4.00 |
| A．10.8 | B．1.08 | C．10.08 |
| A．0.5090 | B．0.590 | C．0.0509 | D．0.59 |
| A．280 | B．2.80 | C．2.08 |
| A．1.0 | B．1.0400 | C．1.4 | D．1.40 |
| A．缩小100倍 | B．扩大100倍 | C．大小不变 |
| A．扩大100倍 | B．缩小100倍 | C．大小不变 |
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