56.5x6.5+44.5x4.5+44.5x2简算

问题描述:

56.5x6.5+44.5x4.5+44.5x2简算

56.5×6.5+44.5×(4.5+2)
=56.5×6.5+44.5×6.5
=56.5×6.5+289.25
=367.25+289.25
=656.5