（1）描述王村与李村分别在仓库的什么位置．（2）现在仓库有400吨水泥，王村需要138吨，李村需要125吨．满足这两个村庄的需要后仓库还剩下多少吨水泥？
用你喜欢的方法计算．+﹣+﹣ 5﹣﹣．
怎样简便怎样算．++=+++=﹣（+）=
．
﹣=+=+=﹣=﹣=﹣=+=﹣= 1﹣﹣=+=
+=﹣= 7.2÷0.3=﹣1=+0.2= 0.54÷9=﹣=﹣=﹣=+= 1÷0.25=+= 0.67+0.3= 0.38×2= 8.1÷0.09= 2﹣= 12×0.5= 2.5×0.6=
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= 7.2÷0.3=
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= 12×0.5= 2.5×0.6=
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