一共能坐多少人？
371×539+248000×0.371+2130×37.1 1990×1999﹣1989×2000 ．
脱式计算，能简便的简便．1.72×+73.8×= 4.2﹣1.38+5.8﹣3.62 0.125×0.25×322÷﹣÷2 90.5×99+90.5．
用简便方法计算511× 2002× 2003×2003﹣2002×2004 7.24×+0.6×2.41﹣0.65×60%
直接写得数= =
怎样简便就怎样18 2.42÷+4.58×﹣4÷3 ．
．
+73.8×
= 4.2﹣1.38+5.8﹣3.62 0.125×0.25×32
﹣
÷2 90.5×99+90.5．
2002×
2003×2003﹣2002×2004 7.24×
+0.6×2.41﹣0.65×60%
= 
=
+4.58×
﹣4÷3 
．
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