| A．1.29×5.4 | B．0.129×5.4 | C．12.9×0.54 |
| A．6×9 | B．6×10 | C．7×9 |
| A．0.065×150 | B．6.5×15 | C．6.5×1.5 | D．0.65×1500 |
| A．5.15 | B．51.5 | C．0.515 |
| A．这两个数大 | B．积大 | C．无法确定 |
| A．三 | B．四 | C．五 |
| A．4.56×21 | B．0.0456×21 | C．45.6×0.21 | D．456×0.021 |
| A．5×9 | B．5×10 | C．6×9 | D．6×10 |
| A．7.8×0.12 | B．0.78×12 | C．780×0.012 | D．78×1.2 |
| A．0.75×0.283 | B．75×28.3 | C．7.5×28.3 | D．0.75×28.3 |
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