小熊从下面盒子里分别摸出一颗弹珠，结果是哪个？
递等式计算++1﹣﹣1﹣+．
﹣+．
．
+= += += ﹣=﹣= += ﹣= +=
直接写出得数1﹣1÷7= 13×99= = 60×25%= == 20÷0.1%= 4.05﹣1.9= ）2﹣）2= 24×=
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= 60×25%= 
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= 20÷0.1%= 4.05﹣1.9= 
）2﹣
）2= 24×
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