直接写得数． 3﹣= ÷= ×= 0÷0.99= ÷= 0.75÷0.125= ÷= 4×=
2013+2012﹣2011﹣2010+2009+2008﹣2007﹣2006+…+5+4﹣3﹣2+1．
20142014×20142013-20142015×20142012
20﹣2.73﹣8.27+1
7.8÷[32×（1﹣）+3.6]
= 
÷
= 
×
= 0÷0.99=
÷
÷
= 4×
=
﹣2.73﹣8.27+1
）+3.6]
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