计算：600÷6= 400÷8= 0÷9= 180÷9=4200÷7= 560÷8= 8000÷2= 500÷5=1500÷5= 204÷2= 1200÷4= 2004÷4=
直接写出得数．============
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直接写出得数．== 1﹣= 4﹣=====
计算下面各题．．
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