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(-370)×(-1/4)+0.25×24.5+(+5又1/2)×1/4
人气:443 ℃ 时间:2019-10-26 12:11:18
解答
(-370)×(-1/4)+0.25×24.5+(+5又1/2)×1/4
=0.25×(370+24.5+5.5)
=0.25×400
=100
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