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(7.88+6.77+5.66)×(9.31+10.98+10)—(7.88+6.77+5.66+10)×(9.31+10.
人气:404 ℃ 时间:2020-05-08 07:29:38
解答
=10×(7.88+6.77+5.66)-10×(9.31+10.98)
=203.1-202.9
=0.2
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