直接写出得数．÷= 0÷= ÷= 4×= ÷×0=÷1= ÷3= ÷= ÷= ×100÷100=
口算+=﹣=+ =﹣= 1﹣= ﹣=．
+=+=﹣=﹣=﹣= 1﹣= 1﹣=+=﹣=
用你喜欢的方法计算下面各题．+﹣﹣+﹣﹣﹣（﹣）+﹣++++（﹣）﹣+﹣．
直接写得数． 1﹣=+=+= 1﹣﹣=+3=+=+=++=
计算下面各题．=========
÷
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