用简便方法计算5.5X13.6-0.36X55 脱式计算!
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用简便方法计算5.5X13.6-0.36X55 脱式计算!
用简便方法计算5.5X13.6-0.36X55 脱式计算!
用简便方法计算5.5X13.6-0.36X55 脱式计算!
5.5X13.6-0.36X55
=5.5X13.6-5.5X3.6
=5.5X(13.6-3.6)
=5.5X10
=55