13.7+1.24×1.37-2.4×0.137 简便
人气：404 ℃ 时间：2019-10-11 00:11:40
解答
13.7+1.24*1.37-2.4*0.137
=10*1.37+1.24*1.37-0.24*1.37
=1.37(10+1.24-0.24)
=1.37*11
=15.07
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