更新时间:2022-01-19 00:52:16 298次访问
6.8×0.25 =(1.7×4)×0.25 =1.7×(4×0.25) =1.7×1 =1.7
6.8×0.25
=6.8×(1/4)
=6.8÷4
=1.7
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