一个长方形，如果它的长减少3米，或它的宽减少2米，那么它的面积都减少36平方米，求这个长方形原来的面积．
直接写得数= = = = == = = = =
直接写得数= = = 3÷8= = == = = = = =
直接写出得数．93= 8.7﹣7= ÷1= 21÷7=7×÷7×= 44÷= 75÷10%= 0.9+99×0.9=
直接写出得数 ．
直接写出得数．÷= += ÷= ×=1÷0.25= ÷1= ÷3= ﹣=
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= 3÷8= 
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÷1
= 21
÷7=
÷7×
= 75÷10%= 0.9+99×0.9=
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×
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÷1= 
÷3= 
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