看谁算得快．0.36+1.7= ×= 0.32×0.05= 1.2÷=×÷×= 6.8﹣1.08= 50×30%= ﹣﹣=0.18÷0.12= （+）×8=
脱式计算（能简算的要简算） 17.64÷4.9+6.733.4÷[（1.2+0.5）×5]1.9+19.9+199.9+0.30.25×12.5×3.2．
脱式计算（怎样算简便就怎样算）． （18.6﹣18.6÷3.1）×1.6 12.5×2.5×3.2 4.5÷18 32.9×0.46+5.4×3.29．
脱式计算． 4.27﹣1.72+0.73﹣2.281.25×8.37×0.8 7.8﹣7.8÷（1.3×1.5）5.28+5.28×9．
脱式计算 （能简算的要简算）． 72.8÷5.6+1.4958.1﹣29.7÷330.94﹣5.09﹣4.91 3.94+34.3×0.25.4×2.3+5.4×7.73.2×12.5×0.25．
计算下面各题，怎样简便怎样计算 6.89+4.7+2.11+5.3125×25﹣125×177.46﹣2.37﹣1.63 14﹣（3.65+0.24）6400÷25÷4（275﹣35）÷（17+43）
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= 0.32×0.05= 1.2÷
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= 6.8﹣1.08= 50×30%= 
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