摘要：9．12 -5( )+4( )-6( )+7( ) 7 +8( )-6( )+4( )-5( )
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| 1.5×4= | 6.4÷0.8= | 7.2×0.01= | 10÷4= |
| 0.36×2= | 1÷0.125= | 0.25×8= | 8.1÷0.3= |
| 0.1×0.02= | 1.6÷16= | 2.4×2.5= | 3.2÷1.6= |
| （1.5+0.25）×4= | 3.5+7.6= | 3×0.2×0.5= | 12-6.2-3.8= |
| 8×（2.5+0.25）= | 2.56-0.37= | 0.125÷0.25= | 7×1.6+7×0.4= |
6+4
11
3+8