怎样简算怎样算．12.5×3.2 0.125×3.41×803.1×0.991.25×（8.1+0.7）1.25×0.88+1.12×1.25．
脱式计算，能简算的要简算47×2.8+52×2.8+2.8 37.6﹣4.87﹣1.1331﹣[0.5×（6﹣5.7）+18]．
（125×125）×8．
简算： 9000÷125÷80.125×5.6+×2.4．
295÷0.25÷4．
9×99+99．
47×2.8+52×2.8+2.8
．
×2.4．
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