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3.5×0.8+5.5×80%+0.8.
人气:421 ℃ 时间:2020-04-04 02:49:09
解答
3.5×0.8+5.5×80%+0.8,
=3.5×0.8+5.5×0.8+0.8×1,
=(3.5+5.5+1)×0.8,
=10×0.8,
=8.
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