4.375-【4.15-2.625】简便计算 快

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4.375-【4.15-2.625】简便计算 快

4.375-【4.15-2.625】简便计算 快
=4.375-4.15+2.625
=4.375+2.625-4.15
7-4.15
=2.85

4.375-【4.15-2.625】
=(4.375+2.625)-4.15
=7-4.15
=2.75