问题标题：
数学有理数的乘法与除法,①[(4*8)*25-8]*125②15*(-3/5+1/3)-24*(5/12-7/15)③(-47.65)*28/11+(-37.15)*(-28/11)+10.5*(-82/11)要用简便运算,第一题要有过程.
问题描述：
数学有理数的乘法与除法,
①[(4*8)*25-8]*125
②15*(-3/5+1/3)-24*(5/12-7/15)
③(-47.65)*28/11+(-37.15)*(-28/11)+10.5*(-82/11)
要用简便运算,第一题要有过程.
傅惠回答：
①[(4*8)*25-8]*125=(4*25-1)*8*125=99*1000=99000
②15*(-3/5+1/3)-24*(5/12-7/15)
=(-9+5)-(10-56/5)
=-4+6/5
=-14/5
③(-47.65)*28/11+(-37.15)*(-28/11)+10.5*(-82/11)
=(-47.65+37.15)*28/11+10.5*(-82/11)
=(-10.5)*28/11+10.5*(-82/11)
=-10.5*(28/11+82/11)
=-10.5*10
=-105
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