这篇文稿有7页，大约共有多少字？
+ + + ．
递等式计算+= +=﹣= ﹣=1﹣= +﹣=1﹣+．
直接写出得数．= = == = 1﹣=
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25×8=8.5﹣3.7=0.56÷0.07=4×9.2×0.25======
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