摘要： 1-0.2= 4.7-0.8= 9.9+2.4=
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| 0.1×0.2= | 1-0.9= | 0.32÷2= | 0.8×5= | 0.9×0.1= |
| 3.11+2.22= | 0.36÷0.4= | 12.5+12.5×7= | 8m-6m= | 10-0.34-0.66= |
| 0.7+0.8= | 10-0.98= | 0.5×2= | 28÷0.25÷0.4= |
| 15.7+3.4=.65-6.5= | 8÷0.5= | 0.5×37.7×2= | 3.7×0.5×4= |
| 0.36÷4= | 0.15×0.6= | （5+0.02-5.02）×1.9= |
2.8×9.05+9.8×1.05
6.7×5.3-4.7+5.3
5.68-4.45+5.32-2.55
57.7÷0.1-477÷（13.26-11.76）
3.24×2.6-3.24+3.24×8.4
[0.15+（4.74-1.8）÷0.4]÷0.1．
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6.7×5.3-4.7+5.3
5.68-4.45+5.32-2.55
57.7÷0.1-477÷（13.26-11.76）
3.24×2.6-3.24+3.24×8.4
[0.15+（4.74-1.8）÷0.4]÷0.1．