| A．a×1.02 | B．a÷1.02 | C．a×0.02 | D．a÷0.02 |
| A．2 | B．2.00 | C．1.99 | D．1.90 |
| A．8.6÷1.5 | B．8.6×0.2 | C．8.6×0 | D．8.6×1 |
| 200×0.04= | 3.5×0.1= | 3.6÷0.09= | 12÷1.2= |
| 0.42÷0.6= | 3.2×0.5= | 0.21×0.3= | 2.5×1.4= |
| 9﹣2.7= | 7.5+9.2= | 2.6×0.3= | 16﹣0.9= |
| 4.5÷0.9= | 8.5×10= | 5.2÷0.2= | 1.2×6= |
| 7.9÷0.1= | 7.6×4= | 4.5÷3= | 0.65÷0.1= |
| 99×0.25= | 0.2×0.04= | 0.24÷0.3= | 0.45÷0.5= |
| 8÷5= | 2.7×2= | 3.6÷0.01= | 0.12+0.8= |
| 0.8×1.25= | 7÷0.25= | 0.4×0.02= | 3.5+7.6= |
| 1.23÷3= | 2.4×2.5= | 16÷1.6= | 0.9÷0.01= |
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