75x101-91=75x(100+1)-(100-9)=7500+75-100+9=7575-100+9=7475+9=7484希望能够帮到你,还望采纳谢谢!
75×101-91=75×(100+1)-91=75×100+75×1-91=7500+75-91=7575-100+9=7475+9=7484