3.45*9.9用简便方法怎么计算?
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3.45*9.9用简便方法怎么计算?
3.45*9.9用简便方法怎么计算?
3.45*9.9用简便方法怎么计算?
3.45*9.9
=3.45*(10-0.1)
=3.45*10-3.45*0.1
=34.5-0.345
=34.155
3.45*9.9用简便方法怎么计算?
3.45*9.9用简便方法怎么计算?
3.45*9.9用简便方法怎么计算?
3.45*9.9
=3.45*(10-0.1)
=3.45*10-3.45*0.1
=34.5-0.345
=34.155