合理计算
8.6×10.178.1﹣7.7÷0.7×5.2〔（8.1﹣5.6）×0.9﹣1〕×0.4
8.25×4.08+0.75×4.08+4.081.25×32×2.58.1÷2+1.9÷2．
直接写得数
12.7﹣（8.65+2.7） 92.5×0.25×46.7×0.9+6.7×0.1
8.25×9.9+0.8253.4×8.7+34×0.136.5×1.1
简便计算
12.5×（0.7×0.8）6.25×1.02 1.25×99
12.5×32×2.54.12﹣1.78﹣1.224.2÷0.7÷6．
0.46×7.5+0.46×2.5
3﹣7.14÷3.5×1.05
9.9×8.6+0.86
[20﹣（90.75÷6.6+2.25）]×11.6．
7.02×900×0.6
0.035÷0.7÷0.5
13.6﹣13.6×0.7
5.62+3.1×0.6+3.38
（25﹣1.25×5）÷2.5
8.1×0.3+1.8×0.3+0.03．
