5.1+5.7*5.1+5.1*3.3=?用简便方法计算.很紧急!
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5.1+5.7*5.1+5.1*3.3=?用简便方法计算.很紧急!
5.1+5.7*5.1+5.1*3.3=?用简便方法计算.很紧急!
5.1+5.7*5.1+5.1*3.3=?用简便方法计算.很紧急!
5.1+5.7*5.1+5.1*3.3
=5.1*(1+5.7+3.3)
=5.1*10
=51