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-147*(-0.125)+253*0.125+72*(0.25)
人气:132 ℃ 时间:2020-06-08 18:03:01
解答
-147*(-0.125)+253*0.125+72*(0.25)
=147*0.125+253*0.125+144*0.125
=(147+253+144)*0.125
=544/8
=68
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