3.5乘4分之5+1.25+2分之3除以5分之4(简便计算)

问题描述:

3.5乘4分之5+1.25+2分之3除以5分之4(简便计算)

3.5乘4分之5+1.25+2分之3除以5分之4
=(3.5+1+3/2)×5/4
=6×5/4
=7.5

3.5乘4分之5+1.25+2分之3除以5分之4
=7/2*5/4+5/4+3/2*5/4
=5/4*(7/2+1+3/2)
=5/4*6
=15/2