用简便方法计算63*34+47*18 687+27*65-194
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用简便方法计算63*34+47*18 687+27*65-194
用简便方法计算63*34+47*18 687+27*65-194
用简便方法计算63*34+47*18 687+27*65-194
63*34+47*18
=9*238+94*9
=9*332
=3320-332
=2988
687+27*65-194
=493+1755
=2248