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120*[1/8-(1/5-6/1)]怎么简算
人气:170 ℃ 时间:2020-10-01 22:54:00
解答
120*[1/8-(1/5-6/1)]
=120*[1/8-1/5+6/1]
=120x1/8-120x1/5+120x1/6
=15-24+20
=11
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