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1.25×2.5×0.64×0.5.
人气:171 ℃ 时间:2020-04-21 15:12:59
解答
1.25×2.5×0.64×0.5,
=1.25×2.5×0.8×0.4×2×0.5,
=(1.25×0.8)×(2.5×0.4)×(2×0.5),
=1×1×1,
=1.
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