一个三角形的面积是47.25cm2，底边长12.6cm．它的高是多少厘米？
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直接写出结果．+=×10%= 3.6÷12= 80%×80%=×4÷×4= 15÷1%=﹣+﹣=
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×10%= 3.6÷12= 80%×80%=
×4÷
×4= 15÷1%=
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