3.79-1.225-(3.775-6.21) 简便计算!

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3.79-1.225-(3.775-6.21)简便计算!3.79-1.225-(3.775-6.21)简便计算!3.79-1.225-(3.775-6.21)简便计算!=3.79-1.225-3.77

3.79-1.225-(3.775-6.21) 简便计算!
3.79-1.225-(3.775-6.21) 简便计算!

3.79-1.225-(3.775-6.21) 简便计算!
=3.79-1.225-3.775+6.21
=(3.79+6.21)-(1.225+3.775)
=10-5
=5