14.28-(10-2.72)的简便计算方法急
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14.28-(10-2.72)的简便计算方法急14.28-(10-2.72)的简便计算方法急14.28-(10-2.72)的简便计算方法急14.28-(10-2.72)=14.28-10+2.72=1
14.28-(10-2.72)的简便计算方法急
14.28-(10-2.72)的简便计算方法
急
14.28-(10-2.72)的简便计算方法急
14.28-(10-2.72)
=14.28-10+2.72
=14.28+2.72-10
=17-10
=7