= = = == = = == = = == = = =
12.6÷0.28= ÷0.8 ÷1.7=5.2．
两个因数的积是10.8，其中一个因数是0.9，另一个因数是 ．
笔算下面各题，带△的要验算． 836÷4= 183÷5= △609÷3= △507÷8=
用竖式完成计算 736÷23=验算 436÷86=
要使算式×（□﹣）÷0.625+0.2=1成立，方格内应填的数是多少？
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×（□﹣
）÷0.625+0.2=1成立，方格内应填的数是多少？