直接写出得数．6= 2.4÷0.004= = 6.3﹣0.98=5.3+9.8= = = 1﹣5%=
+6.28+﹣4.28．
神机妙算细又巧！（写出简算过程）×9+（+）×15×17×12﹣÷×+×+．
×3.6+×0.75．
脱式计算．能简算的要简算 1.26÷0.4÷31.5 18﹣（+）×1051.25×32×0.25．
3.7×0.172+0.37×8.28．
= 2.4÷0.004= 
= 6.3﹣0.98=
= 
= 1﹣5%=
+6.28+
﹣4.28．
×9+
（
+
）×15×17
×12﹣
×
+
×
×3.6+
×0.75．
+
）×1051.25×32×0.25．
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