11/15+7/8-(11/15-1/8)
=11/15+7/8-11/15+1/8
=11/15-11/15+(7/8+1/8)
=1
11/15+7/8-(11/15-1/8)簡便計算
11/15+7/8-(11/15-1/8)簡便計算
數(shù)學人氣:240 ℃時間:2020-03-25 18:31:20
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