笔算下面各题．38×65= 52×49= 27×85= 93×71=
3.7×0.172+0.37×8.28．
6.4×4.2+4.2×4.6﹣4.2．
能简算的要简算 1.6×240﹣16×14 83.3﹣4.14﹣5.86×9﹣×6﹣（+）÷．
÷4+×．
×5.3﹣+3.7×．
×9﹣
﹣（
+
）÷
．
÷4+
×
×5.3﹣
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